81350974 has 8 divisors (see below), whose sum is σ = 126234360. Its totient is φ = 39272856.

The previous prime is 81350959. The next prime is 81351007. The reversal of 81350974 is 47905318.

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, 701244 + ... + 701359.

It is an arithmetic number, because the mean of its divisors is an integer number (15779295).

Almost surely, 2^81350974 is an apocalyptic number.

81350974 is a deficient number, since it is larger than the sum of its proper divisors (44883386).

81350974 is a wasteful number, since it uses less digits than its factorization.

81350974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402634.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 81350974 is about 9019.4774793222. The cubic root of 81350974 is about 433.2988991705.

The spelling of 81350974 in words is "eighty-one million, three hundred fifty thousand, nine hundred seventy-four".