1399389579 has 24 divisors (see below), whose sum is σ = 2357253600. Its totient is φ = 799649424.

The previous prime is 1399389559. The next prime is 1399389583. The reversal of 1399389579 is 9759839931.

It is not a de Polignac number, because 1399389579 - 2⁵ = 1399389547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1399389559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 223572 + ... + 229745.

It is an arithmetic number, because the mean of its divisors is an integer number (98218900).

Almost surely, 2^1399389579 is an apocalyptic number.

1399389579 is a deficient number, since it is larger than the sum of its proper divisors (957864021).

1399389579 is an equidigital number, since it uses as much as digits as its factorization.

1399389579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453344 (or 453327 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 63.

The square root of 1399389579 is about 37408.4158846642. The cubic root of 1399389579 is about 1118.5263300590.

The spelling of 1399389579 in words is "one billion, three hundred ninety-nine million, three hundred eighty-nine thousand, five hundred seventy-nine".