634081623 has 32 divisors (see below), whose sum is σ = 1076912640. Its totient is φ = 323066880.

The previous prime is 634081619. The next prime is 634081627. The reversal of 634081623 is 326180436.

It is an interprime number because it is at equal distance from previous prime (634081619) and next prime (634081627).

It is not a de Polignac number, because 634081623 - 2² = 634081619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634081627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39958 + ... + 53523.

It is an arithmetic number, because the mean of its divisors is an integer number (33653520).

Almost surely, 2^634081623 is an apocalyptic number.

634081623 is a deficient number, since it is larger than the sum of its proper divisors (442831017).

634081623 is a wasteful number, since it uses less digits than its factorization.

634081623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93527.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 634081623 is about 25180.9774035878. The cubic root of 634081623 is about 859.1092376899.

The spelling of 634081623 in words is "six hundred thirty-four million, eighty-one thousand, six hundred twenty-three".