81923162 has 16 divisors (see below), whose sum is σ = 125926272. Its totient is φ = 39953760.

The previous prime is 81923099. The next prime is 81923189. The reversal of 81923162 is 26132918.

It is a super-2 number, since 2×81923162² = 13422808944156488, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29798 + ... + 32430.

It is an arithmetic number, because the mean of its divisors is an integer number (7870392).

Almost surely, 2^81923162 is an apocalyptic number.

81923162 is a deficient number, since it is larger than the sum of its proper divisors (44003110).

81923162 is a wasteful number, since it uses less digits than its factorization.

81923162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013.

The product of its digits is 5184, while the sum is 32.

The square root of 81923162 is about 9051.1414749743. The cubic root of 81923162 is about 434.3124064664.

The spelling of 81923162 in words is "eighty-one million, nine hundred twenty-three thousand, one hundred sixty-two".