634775131 has 2 divisors, whose sum is σ = 634775132. Its totient is φ = 634775130.

The previous prime is 634775059. The next prime is 634775149. The reversal of 634775131 is 131577436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634775131 - 2¹⁹ = 634250843 is a prime.

It is a super-2 number, since 2×634775131² = 805878933872134322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634770131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317387565 + 317387566.

It is an arithmetic number, because the mean of its divisors is an integer number (317387566).

Almost surely, 2^634775131 is an apocalyptic number.

634775131 is a deficient number, since it is larger than the sum of its proper divisors (1).

634775131 is an equidigital number, since it uses as much as digits as its factorization.

634775131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 37.

The square root of 634775131 is about 25194.7441145966. The cubic root of 634775131 is about 859.4223320020.

The spelling of 634775131 in words is "six hundred thirty-four million, seven hundred seventy-five thousand, one hundred thirty-one".