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86621401 = 137632273
BaseRepresentation
bin1010010100110…
…11110011011001
320000222211020001
411022123303121
5134133341101
612332333001
72101161346
oct512336331
9200884201
1086621401
1144993a39
1225014161
1314c3b189
14b70b7cd
157910901
hex529bcd9

86621401 has 4 divisors (see below), whose sum is σ = 87253812. Its totient is φ = 85988992.

The previous prime is 86621389. The next prime is 86621407. The reversal of 86621401 is 10412668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41409225 + 45212176 = 6435^2 + 6724^2 .

It is a cyclic number.

It is not a de Polignac number, because 86621401 - 25 = 86621369 is a prime.

It is a super-2 number, since 2×866214012 = 15006534222405602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86621401.

It is not an unprimeable number, because it can be changed into a prime (86621407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316000 + ... + 316273.

It is an arithmetic number, because the mean of its divisors is an integer number (21813453).

Almost surely, 286621401 is an apocalyptic number.

It is an amenable number.

86621401 is a deficient number, since it is larger than the sum of its proper divisors (632411).

86621401 is a wasteful number, since it uses less digits than its factorization.

86621401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632410.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 86621401 is about 9307.0618886951. The cubic root of 86621401 is about 442.4610726819.

The spelling of 86621401 in words is "eighty-six million, six hundred twenty-one thousand, four hundred one".

Divisors: 1 137 632273 86621401