1309444969 has 4 divisors (see below), whose sum is σ = 1496508544. Its totient is φ = 1122381396.

The previous prime is 1309444943. The next prime is 1309444979. The reversal of 1309444969 is 9694449031.

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 1309444969 - 2⁹ = 1309444457 is a prime.

It is a super-2 number, since 2×1309444969² = 3429292253678821922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1309444979) 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, 93531777 + ... + 93531790.

It is an arithmetic number, because the mean of its divisors is an integer number (374127136).

Almost surely, 2^1309444969 is an apocalyptic number.

It is an amenable number.

1309444969 is a deficient number, since it is larger than the sum of its proper divisors (187063575).

1309444969 is an equidigital number, since it uses as much as digits as its factorization.

1309444969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187063574.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 1309444969 is about 36186.2538680091. The cubic root of 1309444969 is about 1094.0296287096.

The spelling of 1309444969 in words is "one billion, three hundred nine million, four hundred forty-four thousand, nine hundred sixty-nine".