81925914 has 16 divisors (see below), whose sum is σ = 187259328. Its totient is φ = 23407392.

The previous prime is 81925903. The next prime is 81925927. The reversal of 81925914 is 41952918.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975267 + ... + 975350.

It is an arithmetic number, because the mean of its divisors is an integer number (11703708).

Almost surely, 2^81925914 is an apocalyptic number.

81925914 is an abundant number, since it is smaller than the sum of its proper divisors (105333414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81925914 is a wasteful number, since it uses less digits than its factorization.

81925914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950629.

The product of its digits is 25920, while the sum is 39.

The square root of 81925914 is about 9051.2934987216. The cubic root of 81925914 is about 434.3172696184.

The spelling of 81925914 in words is "eighty-one million, nine hundred twenty-five thousand, nine hundred fourteen".