253606634 has 4 divisors (see below), whose sum is σ = 380409954. Its totient is φ = 126803316.

The previous prime is 253606631. The next prime is 253606679. The reversal of 253606634 is 436606352.

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

It can be written as a sum of positive squares in only one way, i.e., 191905609 + 61701025 = 13853^2 + 7855^2 .

It is a junction number, because it is equal to n+sod(n) for n = 253606594 and 253606603.

It is not an unprimeable number, because it can be changed into a prime (253606631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63401657 + ... + 63401660.

Almost surely, 2^253606634 is an apocalyptic number.

253606634 is a deficient number, since it is larger than the sum of its proper divisors (126803320).

253606634 is a wasteful number, since it uses less digits than its factorization.

253606634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126803319.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 253606634 is about 15925.0316797173. The cubic root of 253606634 is about 632.9754554912.

The spelling of 253606634 in words is "two hundred fifty-three million, six hundred six thousand, six hundred thirty-four".