635472961 has 4 divisors (see below), whose sum is σ = 637889472. Its totient is φ = 633056452.

The previous prime is 635472953. The next prime is 635472967. The reversal of 635472961 is 169274536.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 635472961 - 2³ = 635472953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (635472967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207861 + ... + 1208386.

It is an arithmetic number, because the mean of its divisors is an integer number (159472368).

Almost surely, 2^635472961 is an apocalyptic number.

It is an amenable number.

635472961 is a deficient number, since it is larger than the sum of its proper divisors (2416511).

635472961 is a wasteful number, since it uses less digits than its factorization.

635472961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416510.

The product of its digits is 272160, while the sum is 43.

The square root of 635472961 is about 25208.5890323120. The cubic root of 635472961 is about 859.7371474501.

The spelling of 635472961 in words is "six hundred thirty-five million, four hundred seventy-two thousand, nine hundred sixty-one".