73439957 has 2 divisors, whose sum is σ = 73439958. Its totient is φ = 73439956.

The previous prime is 73439939. The next prime is 73439981. The reversal of 73439957 is 75993437.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73119601 + 320356 = 8551^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 73439957 - 2⁸ = 73439701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73439057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36719978 + 36719979.

It is an arithmetic number, because the mean of its divisors is an integer number (36719979).

Almost surely, 2^73439957 is an apocalyptic number.

It is an amenable number.

73439957 is a deficient number, since it is larger than the sum of its proper divisors (1).

73439957 is an equidigital number, since it uses as much as digits as its factorization.

73439957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 47.

The square root of 73439957 is about 8569.7116054159. The cubic root of 73439957 is about 418.7718410825.

The spelling of 73439957 in words is "seventy-three million, four hundred thirty-nine thousand, nine hundred fifty-seven".