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87934231 = 7111142003
BaseRepresentation
bin1010011110111…
…00010100010111
320010110112002101
411033130110113
5140002343411
612420422531
72115300010
oct517342427
9203415071
1087934231
1145700320
1225547a47
13152aa8b8
14b970007
157abe8c1
hex53dc517

87934231 has 8 divisors (see below), whose sum is σ = 109632384. Its totient is φ = 68520120.

The previous prime is 87934229. The next prime is 87934243. The reversal of 87934231 is 13243978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87934231 - 21 = 87934229 is a prime.

It is a super-2 number, since 2×879342312 = 15464857963122722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87934531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570925 + ... + 571078.

It is an arithmetic number, because the mean of its divisors is an integer number (13704048).

Almost surely, 287934231 is an apocalyptic number.

87934231 is a deficient number, since it is larger than the sum of its proper divisors (21698153).

87934231 is a wasteful number, since it uses less digits than its factorization.

87934231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142021.

The product of its digits is 36288, while the sum is 37.

The square root of 87934231 is about 9377.3253649428. The cubic root of 87934231 is about 444.6851806889.

The spelling of 87934231 in words is "eighty-seven million, nine hundred thirty-four thousand, two hundred thirty-one".

Divisors: 1 7 11 77 1142003 7994021 12562033 87934231