634530101 has 4 divisors (see below), whose sum is σ = 638571852. Its totient is φ = 630488352.

The previous prime is 634530097. The next prime is 634530107. The reversal of 634530101 is 101035436.

It is a happy number.

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 441042001 + 193488100 = 21001^2 + 13910^2 .

It is a cyclic number.

It is not a de Polignac number, because 634530101 - 2² = 634530097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634530107) 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, 2020640 + ... + 2020953.

It is an arithmetic number, because the mean of its divisors is an integer number (159642963).

Almost surely, 2^634530101 is an apocalyptic number.

It is an amenable number.

634530101 is a deficient number, since it is larger than the sum of its proper divisors (4041751).

634530101 is a wasteful number, since it uses less digits than its factorization.

634530101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041750.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 634530101 is about 25189.8809246888. The cubic root of 634530101 is about 859.3117356950.

Adding to 634530101 its reverse (101035436), we get a palindrome (735565537).

The spelling of 634530101 in words is "six hundred thirty-four million, five hundred thirty thousand, one hundred one".