321999634 has 12 divisors (see below), whose sum is σ = 530900622. Its totient is φ = 146363360.

The previous prime is 321999599. The next prime is 321999649. The reversal of 321999634 is 436999123.

It can be written as a sum of positive squares in only one way, i.e., 182169009 + 139830625 = 13497^2 + 11825^2 .

It is a super-2 number, since 2×321999634² = 207367528592267912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 665047 + ... + 665530.

Almost surely, 2^321999634 is an apocalyptic number.

321999634 is a deficient number, since it is larger than the sum of its proper divisors (208900988).

321999634 is a wasteful number, since it uses less digits than its factorization.

321999634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330601 (or 1330590 counting only the distinct ones).

The product of its digits is 314928, while the sum is 46.

The square root of 321999634 is about 17944.3482467322. The cubic root of 321999634 is about 685.4121404928.

The spelling of 321999634 in words is "three hundred twenty-one million, nine hundred ninety-nine thousand, six hundred thirty-four".