657378713 has 2 divisors, whose sum is σ = 657378714. Its totient is φ = 657378712.

The previous prime is 657378697. The next prime is 657378727. The reversal of 657378713 is 317873756.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471410944 + 185967769 = 21712^2 + 13637^2 .

It is a cyclic number.

It is not a de Polignac number, because 657378713 - 2⁴ = 657378697 is a prime.

It is not a weakly prime, because it can be changed into another prime (657378913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328689356 + 328689357.

It is an arithmetic number, because the mean of its divisors is an integer number (328689357).

Almost surely, 2^657378713 is an apocalyptic number.

It is an amenable number.

657378713 is a deficient number, since it is larger than the sum of its proper divisors (1).

657378713 is an equidigital number, since it uses as much as digits as its factorization.

657378713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 47.

The square root of 657378713 is about 25639.3976723323. The cubic root of 657378713 is about 869.5045900148.

The spelling of 657378713 in words is "six hundred fifty-seven million, three hundred seventy-eight thousand, seven hundred thirteen".