309464661 has 16 divisors (see below), whose sum is σ = 464652288. Its totient is φ = 181503600.

The previous prime is 309464657. The next prime is 309464669. The reversal of 309464661 is 166464903.

It is not a de Polignac number, because 309464661 - 2² = 309464657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309464669) 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 15 ways as a sum of consecutive naturals, for example, 150231 + ... + 152276.

It is an arithmetic number, because the mean of its divisors is an integer number (29040768).

Almost surely, 2^309464661 is an apocalyptic number.

309464661 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

309464661 is a deficient number, since it is larger than the sum of its proper divisors (155187627).

309464661 is a wasteful number, since it uses less digits than its factorization.

309464661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302552.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 309464661 is about 17591.6076866215. The cubic root of 309464661 is about 676.4001378863.

The spelling of 309464661 in words is "three hundred nine million, four hundred sixty-four thousand, six hundred sixty-one".