73072457 has 2 divisors, whose sum is σ = 73072458. Its totient is φ = 73072456.

The previous prime is 73072427. The next prime is 73072459. The reversal of 73072457 is 75427037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71842576 + 1229881 = 8476^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 73072457 - 2⁸ = 73072201 is a prime.

Together with 73072459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73072459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36536228 + 36536229.

It is an arithmetic number, because the mean of its divisors is an integer number (36536229).

Almost surely, 2^73072457 is an apocalyptic number.

It is an amenable number.

73072457 is a deficient number, since it is larger than the sum of its proper divisors (1).

73072457 is an equidigital number, since it uses as much as digits as its factorization.

73072457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 73072457 is about 8548.2429188694. The cubic root of 73072457 is about 418.0721489739.

The spelling of 73072457 in words is "seventy-three million, seventy-two thousand, four hundred fifty-seven".