634772491 has 2 divisors, whose sum is σ = 634772492. Its totient is φ = 634772490.

The previous prime is 634772477. The next prime is 634772497. The reversal of 634772491 is 194277436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634772491 - 2⁷ = 634772363 is a prime.

It is a super-2 number, since 2×634772491² = 805872230660690162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634772497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317386245 + 317386246.

It is an arithmetic number, because the mean of its divisors is an integer number (317386246).

Almost surely, 2^634772491 is an apocalyptic number.

634772491 is a deficient number, since it is larger than the sum of its proper divisors (1).

634772491 is an equidigital number, since it uses as much as digits as its factorization.

634772491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 634772491 is about 25194.6917226625. The cubic root of 634772491 is about 859.4211405679.

The spelling of 634772491 in words is "six hundred thirty-four million, seven hundred seventy-two thousand, four hundred ninety-one".