81370698 has 8 divisors (see below), whose sum is σ = 162741408. Its totient is φ = 27123564.

The previous prime is 81370651. The next prime is 81370699. The reversal of 81370698 is 89607318.

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

81370698 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (81370699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6780886 + ... + 6780897.

It is an arithmetic number, because the mean of its divisors is an integer number (20342676).

Almost surely, 2^81370698 is an apocalyptic number.

81370698 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81370698 is a wasteful number, since it uses less digits than its factorization.

81370698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13561788.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 81370698 is about 9020.5708245099. The cubic root of 81370698 is about 433.3339149236. Note that the first 3 decimals are identical.

The spelling of 81370698 in words is "eighty-one million, three hundred seventy thousand, six hundred ninety-eight".