309466397 has 4 divisors (see below), whose sum is σ = 319449216. Its totient is φ = 299483580.

The previous prime is 309466393. The next prime is 309466411. The reversal of 309466397 is 793664903.

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 309466397 - 2² = 309466393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309466393) 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 3 ways as a sum of consecutive naturals, for example, 4991363 + ... + 4991424.

It is an arithmetic number, because the mean of its divisors is an integer number (79862304).

Almost surely, 2^309466397 is an apocalyptic number.

It is an amenable number.

309466397 is a deficient number, since it is larger than the sum of its proper divisors (9982819).

309466397 is an equidigital number, since it uses as much as digits as its factorization.

309466397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9982818.

The product of its (nonzero) digits is 734832, while the sum is 47.

The square root of 309466397 is about 17591.6570282620. The cubic root of 309466397 is about 676.4014026817.

The spelling of 309466397 in words is "three hundred nine million, four hundred sixty-six thousand, three hundred ninety-seven".