634542757 has 2 divisors, whose sum is σ = 634542758. Its totient is φ = 634542756.

The previous prime is 634542749. The next prime is 634542793. The reversal of 634542757 is 757245436.

634542757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 581340321 + 53202436 = 24111^2 + 7294^2 .

It is a cyclic number.

It is not a de Polignac number, because 634542757 - 2³ = 634542749 is a prime.

It is a super-2 number, since 2×634542757² = 805289020922322098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634512757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317271378 + 317271379.

It is an arithmetic number, because the mean of its divisors is an integer number (317271379).

Almost surely, 2^634542757 is an apocalyptic number.

It is an amenable number.

634542757 is a deficient number, since it is larger than the sum of its proper divisors (1).

634542757 is an equidigital number, since it uses as much as digits as its factorization.

634542757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 43.

The square root of 634542757 is about 25190.1321354216. The cubic root of 634542757 is about 859.3174487820.

The spelling of 634542757 in words is "six hundred thirty-four million, five hundred forty-two thousand, seven hundred fifty-seven".