699609312 has 120 divisors (see below), whose sum is σ = 2105716536. Its totient is φ = 227743488.

The previous prime is 699609307. The next prime is 699609319. The reversal of 699609312 is 213906996.

It is a happy number.

699609312 is a `hidden beast` number, since 6 + 9 + 9 + 609 + 31 + 2 = 666.

It is a super-2 number, since 2×699609312² = 978906378874226688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699609319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 108318 + ... + 114594.

Almost surely, 2^699609312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699609312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1052858268).

699609312 is an abundant number, since it is smaller than the sum of its proper divisors (1406107224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

699609312 is a wasteful number, since it uses less digits than its factorization.

699609312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342 (or 6325 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 699609312 is about 26450.1287709531. The cubic root of 699609312 is about 887.7387836496.

The spelling of 699609312 in words is "six hundred ninety-nine million, six hundred nine thousand, three hundred twelve".