693257057 has 2 divisors, whose sum is σ = 693257058. Its totient is φ = 693257056.

The previous prime is 693257017. The next prime is 693257083. The reversal of 693257057 is 750752396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 449397601 + 243859456 = 21199^2 + 15616^2 .

It is a cyclic number.

It is not a de Polignac number, because 693257057 - 2²⁰ = 692208481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 693256999 and 693257017.

It is not a weakly prime, because it can be changed into another prime (693257017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346628528 + 346628529.

It is an arithmetic number, because the mean of its divisors is an integer number (346628529).

Almost surely, 2^693257057 is an apocalyptic number.

It is an amenable number.

693257057 is a deficient number, since it is larger than the sum of its proper divisors (1).

693257057 is an equidigital number, since it uses as much as digits as its factorization.

693257057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 396900, while the sum is 44.

The square root of 693257057 is about 26329.7751034831. The cubic root of 693257057 is about 885.0438047412.

The spelling of 693257057 in words is "six hundred ninety-three million, two hundred fifty-seven thousand, fifty-seven".