73819957 has 2 divisors, whose sum is σ = 73819958. Its totient is φ = 73819956.

The previous prime is 73819931. The next prime is 73819961. The reversal of 73819957 is 75991837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65141041 + 8678916 = 8071^2 + 2946^2 .

It is a cyclic number.

It is not a de Polignac number, because 73819957 - 2²³ = 65431349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73819957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73819357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36909978 + 36909979.

It is an arithmetic number, because the mean of its divisors is an integer number (36909979).

Almost surely, 2^73819957 is an apocalyptic number.

It is an amenable number.

73819957 is a deficient number, since it is larger than the sum of its proper divisors (1).

73819957 is an equidigital number, since it uses as much as digits as its factorization.

73819957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 73819957 is about 8591.8541072344. The cubic root of 73819957 is about 419.4928818930.

The spelling of 73819957 in words is "seventy-three million, eight hundred nineteen thousand, nine hundred fifty-seven".