657087073 has 2 divisors, whose sum is σ = 657087074. Its totient is φ = 657087072.

The previous prime is 657087049. The next prime is 657087091. The reversal of 657087073 is 370780756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406909584 + 250177489 = 20172^2 + 15817^2 .

It is a cyclic number.

It is not a de Polignac number, because 657087073 - 2⁹ = 657086561 is a prime.

It is not a weakly prime, because it can be changed into another prime (657087173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328543536 + 328543537.

It is an arithmetic number, because the mean of its divisors is an integer number (328543537).

Almost surely, 2^657087073 is an apocalyptic number.

It is an amenable number.

657087073 is a deficient number, since it is larger than the sum of its proper divisors (1).

657087073 is an equidigital number, since it uses as much as digits as its factorization.

657087073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 657087073 is about 25633.7097003145. The cubic root of 657087073 is about 869.3759884326.

The spelling of 657087073 in words is "six hundred fifty-seven million, eighty-seven thousand, seventy-three".