81303704 has 16 divisors (see below), whose sum is σ = 157701600. Its totient is φ = 39249952.

The previous prime is 81303683. The next prime is 81303713. The reversal of 81303704 is 40730318.

It is a super-2 number, since 2×81303704² = 13220584568239232, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 174992 + ... + 175455.

It is an arithmetic number, because the mean of its divisors is an integer number (9856350).

Almost surely, 2^81303704 is an apocalyptic number.

It is an amenable number.

81303704 is a deficient number, since it is larger than the sum of its proper divisors (76397896).

81303704 is a wasteful number, since it uses less digits than its factorization.

81303704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350482 (or 350478 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 81303704 is about 9016.8566585036. The cubic root of 81303704 is about 433.2149583301.

The spelling of 81303704 in words is "eighty-one million, three hundred three thousand, seven hundred four".