81892337 has 8 divisors (see below), whose sum is σ = 86784000. Its totient is φ = 77058864.

The previous prime is 81892331. The next prime is 81892373. The reversal of 81892337 is 73329818.

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 81892337 - 2²⁶ = 14783473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81892294 and 81892303.

It is not an unprimeable number, because it can be changed into a prime (81892331) 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, 11633 + ... + 17294.

It is an arithmetic number, because the mean of its divisors is an integer number (10848000).

Almost surely, 2^81892337 is an apocalyptic number.

It is an amenable number.

81892337 is a deficient number, since it is larger than the sum of its proper divisors (4891663).

81892337 is a wasteful number, since it uses less digits than its factorization.

81892337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29095.

The product of its digits is 72576, while the sum is 41.

The square root of 81892337 is about 9049.4384908678. The cubic root of 81892337 is about 434.2579271264.

The spelling of 81892337 in words is "eighty-one million, eight hundred ninety-two thousand, three hundred thirty-seven".