309469690 has 12 divisors (see below), whose sum is σ = 557145594. Its totient is φ = 123765624.

The previous prime is 309469687. The next prime is 309469709. The reversal of 309469690 is 96964903.

309469690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 278522721 + 30946969 = 16689^2 + 5563^2 .

It is a super-2 number, since 2×309469690² = 191542978057392200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 309469690.

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, 52849 + ... + 58411.

Almost surely, 2^309469690 is an apocalyptic number.

309469690 is a deficient number, since it is larger than the sum of its proper divisors (247675904).

309469690 is an frugal number, since it uses more digits than its factorization.

309469690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11133 (or 5570 counting only the distinct ones).

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

The square root of 309469690 is about 17591.7506235167. The cubic root of 309469690 is about 676.4038018457.

The spelling of 309469690 in words is "three hundred nine million, four hundred sixty-nine thousand, six hundred ninety".