634172097 has 32 divisors (see below), whose sum is σ = 977453568. Its totient is φ = 362244096.

The previous prime is 634172093. The next prime is 634172113. The reversal of 634172097 is 790271436.

It is not a de Polignac number, because 634172097 - 2² = 634172093 is a prime.

It is a super-2 number, since 2×634172097² = 804348497226754818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (634172093) 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, 41848 + ... + 54950.

It is an arithmetic number, because the mean of its divisors is an integer number (30545424).

Almost surely, 2^634172097 is an apocalyptic number.

It is an amenable number.

634172097 is a deficient number, since it is larger than the sum of its proper divisors (343281471).

634172097 is a wasteful number, since it uses less digits than its factorization.

634172097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13209.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 634172097 is about 25182.7738146535. The cubic root of 634172097 is about 859.1500964426.

The spelling of 634172097 in words is "six hundred thirty-four million, one hundred seventy-two thousand, ninety-seven".