1304399969 has 4 divisors (see below), whose sum is σ = 1334734896. Its totient is φ = 1274065044.

The previous prime is 1304399959. The next prime is 1304399981. The reversal of 1304399969 is 9699934031.

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 1304399969 - 2¹⁶ = 1304334433 is a prime.

It is a super-2 number, since 2×1304399969² = 3402918558254401922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1304399969.

It is not an unprimeable number, because it can be changed into a prime (1304399909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15167399 + ... + 15167484.

It is an arithmetic number, because the mean of its divisors is an integer number (333683724).

Almost surely, 2^1304399969 is an apocalyptic number.

It is an amenable number.

1304399969 is a deficient number, since it is larger than the sum of its proper divisors (30334927).

1304399969 is an equidigital number, since it uses as much as digits as its factorization.

1304399969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30334926.

The product of its (nonzero) digits is 1417176, while the sum is 53.

The square root of 1304399969 is about 36116.4778044593. The cubic root of 1304399969 is about 1092.6228028833.

The spelling of 1304399969 in words is "one billion, three hundred four million, three hundred ninety-nine thousand, nine hundred sixty-nine".