81370798 has 8 divisors (see below), whose sum is σ = 122103792. Its totient is φ = 40669536.

The previous prime is 81370759. The next prime is 81370801. The reversal of 81370798 is 89707318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111 + ... + 12757.

It is an arithmetic number, because the mean of its divisors is an integer number (15262974).

Almost surely, 2^81370798 is an apocalyptic number.

81370798 is a deficient number, since it is larger than the sum of its proper divisors (40732994).

81370798 is a wasteful number, since it uses less digits than its factorization.

81370798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15866.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 81370798 is about 9020.5763673947. The cubic root of 81370798 is about 433.3340924379.

The spelling of 81370798 in words is "eighty-one million, three hundred seventy thousand, seven hundred ninety-eight".