72977902 has 4 divisors (see below), whose sum is σ = 109466856. Its totient is φ = 36488950.

The previous prime is 72977897. The next prime is 72977911. The reversal of 72977902 is 20977927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20977927 = 37 ⋅566971.

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, 18244474 + ... + 18244477.

It is an arithmetic number, because the mean of its divisors is an integer number (27366714).

Almost surely, 2^72977902 is an apocalyptic number.

72977902 is a deficient number, since it is larger than the sum of its proper divisors (36488954).

72977902 is a wasteful number, since it uses less digits than its factorization.

72977902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36488953.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 72977902 is about 8542.7104598014. The cubic root of 72977902 is about 417.8917441321.

The spelling of 72977902 in words is "seventy-two million, nine hundred seventy-seven thousand, nine hundred two".