634953551 has 2 divisors, whose sum is σ = 634953552. Its totient is φ = 634953550.

The previous prime is 634953509. The next prime is 634953589. The reversal of 634953551 is 155359436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634953551 - 2²⁶ = 567844687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634953499 and 634953508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634950551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317476775 + 317476776.

It is an arithmetic number, because the mean of its divisors is an integer number (317476776).

Almost surely, 2^634953551 is an apocalyptic number.

634953551 is a deficient number, since it is larger than the sum of its proper divisors (1).

634953551 is an equidigital number, since it uses as much as digits as its factorization.

634953551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 41.

The square root of 634953551 is about 25198.2846836843. The cubic root of 634953551 is about 859.5028454314.

The spelling of 634953551 in words is "six hundred thirty-four million, nine hundred fifty-three thousand, five hundred fifty-one".