1389324979 has 12 divisors (see below), whose sum is σ = 1643549400. Its totient is φ = 1170663648.

The previous prime is 1389324961. The next prime is 1389324997. The reversal of 1389324979 is 9794239831.

It is an interprime number because it is at equal distance from previous prime (1389324961) and next prime (1389324997).

It is not a de Polignac number, because 1389324979 - 2¹³ = 1389316787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389324929) 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, 237394 + ... + 243175.

It is an arithmetic number, because the mean of its divisors is an integer number (136962450).

Almost surely, 2^1389324979 is an apocalyptic number.

1389324979 is a deficient number, since it is larger than the sum of its proper divisors (254224421).

1389324979 is an equidigital number, since it uses as much as digits as its factorization.

1389324979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480642 (or 480635 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 55.

The square root of 1389324979 is about 37273.6499286024. The cubic root of 1389324979 is about 1115.8383444866.

The spelling of 1389324979 in words is "one billion, three hundred eighty-nine million, three hundred twenty-four thousand, nine hundred seventy-nine".