634157063 has 2 divisors, whose sum is σ = 634157064. Its totient is φ = 634157062.

The previous prime is 634157057. The next prime is 634157119. The reversal of 634157063 is 360751436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634157063 - 2⁴ = 634157047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634157033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317078531 + 317078532.

It is an arithmetic number, because the mean of its divisors is an integer number (317078532).

Almost surely, 2^634157063 is an apocalyptic number.

634157063 is a deficient number, since it is larger than the sum of its proper divisors (1).

634157063 is an equidigital number, since it uses as much as digits as its factorization.

634157063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 634157063 is about 25182.4753151869. The cubic root of 634157063 is about 859.1433072421.

The spelling of 634157063 in words is "six hundred thirty-four million, one hundred fifty-seven thousand, sixty-three".