80971390 has 32 divisors (see below), whose sum is σ = 148561920. Its totient is φ = 31770144.

The previous prime is 80971361. The next prime is 80971441. The reversal of 80971390 is 9317908.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130501 + ... + 131119.

It is an arithmetic number, because the mean of its divisors is an integer number (4642560).

Almost surely, 2^80971390 is an apocalyptic number.

80971390 is a deficient number, since it is larger than the sum of its proper divisors (67590530).

80971390 is a wasteful number, since it uses less digits than its factorization.

80971390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 80971390 is about 8998.4104151789. The cubic root of 80971390 is about 432.6239234141.

The spelling of 80971390 in words is "eighty million, nine hundred seventy-one thousand, three hundred ninety".