634497047 has 2 divisors, whose sum is σ = 634497048. Its totient is φ = 634497046.

The previous prime is 634497043. The next prime is 634497107. The reversal of 634497047 is 740794436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634497047 - 2² = 634497043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634496989 and 634497007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634497041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317248523 + 317248524.

It is an arithmetic number, because the mean of its divisors is an integer number (317248524).

Almost surely, 2^634497047 is an apocalyptic number.

634497047 is a deficient number, since it is larger than the sum of its proper divisors (1).

634497047 is an equidigital number, since it uses as much as digits as its factorization.

634497047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 634497047 is about 25189.2248193548. The cubic root of 634497047 is about 859.2968143207.

The spelling of 634497047 in words is "six hundred thirty-four million, four hundred ninety-seven thousand, forty-seven".