117992645 has 32 divisors (see below), whose sum is σ = 153280512. Its totient is φ = 86974272.

The previous prime is 117992621. The next prime is 117992659. The reversal of 117992645 is 546299711.

117992645 = T₂₅₃ + T₂₅₄ + ... + T₈₉₇.

It is a cyclic number.

It is not a de Polignac number, because 117992645 - 2²² = 113798341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 117992596 and 117992605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529004 + ... + 529226.

It is an arithmetic number, because the mean of its divisors is an integer number (4790016).

Almost surely, 2^117992645 is an apocalyptic number.

It is an amenable number.

117992645 is a deficient number, since it is larger than the sum of its proper divisors (35287867).

117992645 is a wasteful number, since it uses less digits than its factorization.

117992645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its digits is 136080, while the sum is 44.

The square root of 117992645 is about 10862.4419446090. The cubic root of 117992645 is about 490.4766221765.

The spelling of 117992645 in words is "one hundred seventeen million, nine hundred ninety-two thousand, six hundred forty-five".