72977494 has 4 divisors (see below), whose sum is σ = 109466244. Its totient is φ = 36488746.

The previous prime is 72977483. The next prime is 72977507. The reversal of 72977494 is 49477927.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18244372 + ... + 18244375.

It is an arithmetic number, because the mean of its divisors is an integer number (27366561).

Almost surely, 2^72977494 is an apocalyptic number.

72977494 is a deficient number, since it is larger than the sum of its proper divisors (36488750).

72977494 is a wasteful number, since it uses less digits than its factorization.

72977494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36488749.

The product of its digits is 889056, while the sum is 49.

The square root of 72977494 is about 8542.6865797593. The cubic root of 72977494 is about 417.8909653569.

The spelling of 72977494 in words is "seventy-two million, nine hundred seventy-seven thousand, four hundred ninety-four".