1399576009 has 12 divisors (see below), whose sum is σ = 1532402508. Its totient is φ = 1270693440.

The previous prime is 1399576001. The next prime is 1399576019. The reversal of 1399576009 is 9006759931.

It can be written as a sum of positive squares in 6 ways, for example, as 700766784 + 698809225 = 26472^2 + 26435^2 .

It is not a de Polignac number, because 1399576009 - 2³ = 1399576001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1399576001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33907 + ... + 62839.

It is an arithmetic number, because the mean of its divisors is an integer number (127700209).

Almost surely, 2^1399576009 is an apocalyptic number.

It is an amenable number.

1399576009 is a deficient number, since it is larger than the sum of its proper divisors (132826499).

1399576009 is an equidigital number, since it uses as much as digits as its factorization.

1399576009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29068 (or 29007 counting only the distinct ones).

The product of its (nonzero) digits is 459270, while the sum is 49.

The square root of 1399576009 is about 37410.9076206392. The cubic root of 1399576009 is about 1118.5759987639.

The spelling of 1399576009 in words is "one billion, three hundred ninety-nine million, five hundred seventy-six thousand, nine".