81970346 has 16 divisors (see below), whose sum is σ = 125978976. Its totient is φ = 39989136.

The previous prime is 81970333. The next prime is 81970363. The reversal of 81970346 is 64307918.

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, 11480 + ... + 17196.

It is an arithmetic number, because the mean of its divisors is an integer number (7873686).

Almost surely, 2^81970346 is an apocalyptic number.

81970346 is a deficient number, since it is larger than the sum of its proper divisors (44008630).

81970346 is a wasteful number, since it uses less digits than its factorization.

81970346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 81970346 is about 9053.7476218415. The cubic root of 81970346 is about 434.3957718342.

The spelling of 81970346 in words is "eighty-one million, nine hundred seventy thousand, three hundred forty-six".