72406877 has 2 divisors, whose sum is σ = 72406878. Its totient is φ = 72406876.

The previous prime is 72406843. The next prime is 72406889. The reversal of 72406877 is 77860427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72267001 + 139876 = 8501^2 + 374^2 .

It is an emirp because it is prime and its reverse (77860427) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72406877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72406177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36203438 + 36203439.

It is an arithmetic number, because the mean of its divisors is an integer number (36203439).

Almost surely, 2^72406877 is an apocalyptic number.

It is an amenable number.

72406877 is a deficient number, since it is larger than the sum of its proper divisors (1).

72406877 is an equidigital number, since it uses as much as digits as its factorization.

72406877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 72406877 is about 8509.2230550151. The cubic root of 72406877 is about 416.7989396226.

The spelling of 72406877 in words is "seventy-two million, four hundred six thousand, eight hundred seventy-seven".