635677321 has 4 divisors (see below), whose sum is σ = 636194944. Its totient is φ = 635159700.

The previous prime is 635677313. The next prime is 635677327. The reversal of 635677321 is 123776536.

635677321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 635677321 - 2³ = 635677313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (635677327) 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, 256965 + ... + 259426.

It is an arithmetic number, because the mean of its divisors is an integer number (159048736).

Almost surely, 2^635677321 is an apocalyptic number.

It is an amenable number.

635677321 is a deficient number, since it is larger than the sum of its proper divisors (517623).

635677321 is a wasteful number, since it uses less digits than its factorization.

635677321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517622.

The product of its digits is 158760, while the sum is 40.

The square root of 635677321 is about 25212.6420868579. The cubic root of 635677321 is about 859.8292977401.

The spelling of 635677321 in words is "six hundred thirty-five million, six hundred seventy-seven thousand, three hundred twenty-one".