71924497 has 2 divisors, whose sum is σ = 71924498. Its totient is φ = 71924496.

The previous prime is 71924477. The next prime is 71924521. The reversal of 71924497 is 79442917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 20214016 = 7191^2 + 4496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71924497 is a prime.

It is not a weakly prime, because it can be changed into another prime (71924417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35962248 + 35962249.

It is an arithmetic number, because the mean of its divisors is an integer number (35962249).

Almost surely, 2^71924497 is an apocalyptic number.

It is an amenable number.

71924497 is a deficient number, since it is larger than the sum of its proper divisors (1).

71924497 is an equidigital number, since it uses as much as digits as its factorization.

71924497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 71924497 is about 8480.8311503060. The cubic root of 71924497 is about 415.8712947041.

The spelling of 71924497 in words is "seventy-one million, nine hundred twenty-four thousand, four hundred ninety-seven".