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84253661 = 332925309
BaseRepresentation
bin1010000010110…
…01101111011101
312212112112021222
411001121233131
5133032104121
612205503125
72042100332
oct501315735
9185475258
1084253661
1143617028
1224271aa5
13145bc54b
14b292989
1575e40ab
hex5059bdd

84253661 has 4 divisors (see below), whose sum is σ = 84282300. Its totient is φ = 84225024.

The previous prime is 84253651. The next prime is 84253667. The reversal of 84253661 is 16635248.

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 41925625 + 42328036 = 6475^2 + 6506^2 .

It is a cyclic number.

It is not a de Polignac number, because 84253661 - 214 = 84237277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84253667) 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, 9326 + ... + 15983.

It is an arithmetic number, because the mean of its divisors is an integer number (21070575).

Almost surely, 284253661 is an apocalyptic number.

It is an amenable number.

84253661 is a deficient number, since it is larger than the sum of its proper divisors (28639).

84253661 is a wasteful number, since it uses less digits than its factorization.

84253661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28638.

The product of its digits is 34560, while the sum is 35.

The square root of 84253661 is about 9178.9793005541. The cubic root of 84253661 is about 438.3923095607.

The spelling of 84253661 in words is "eighty-four million, two hundred fifty-three thousand, six hundred sixty-one".

Divisors: 1 3329 25309 84253661