634536101 has 4 divisors (see below), whose sum is σ = 671861772. Its totient is φ = 597210432.

The previous prime is 634536083. The next prime is 634536107. The reversal of 634536101 is 101635436.

It is a happy number.

It is a Cunningham number, because it is equal to 25190²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 493995076 + 140541025 = 22226^2 + 11855^2 .

It is a cyclic number.

It is not a de Polignac number, because 634536101 - 2¹⁸ = 634273957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634536107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18662810 + ... + 18662843.

It is an arithmetic number, because the mean of its divisors is an integer number (167965443).

Almost surely, 2^634536101 is an apocalyptic number.

It is an amenable number.

634536101 is a deficient number, since it is larger than the sum of its proper divisors (37325671).

634536101 is a wasteful number, since it uses less digits than its factorization.

634536101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37325670.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 634536101 is about 25190.0000198491. Note that the first 4 decimals coincide. The cubic root of 634536101 is about 859.3144441844.

The spelling of 634536101 in words is "six hundred thirty-four million, five hundred thirty-six thousand, one hundred one".