1396976979 has 4 divisors (see below), whose sum is σ = 1862635976. Its totient is φ = 931317984.

The previous prime is 1396976929. The next prime is 1396977007. The reversal of 1396976979 is 9796796931.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1396976979 - 2¹⁷ = 1396845907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396976909) 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, 232829494 + ... + 232829499.

It is an arithmetic number, because the mean of its divisors is an integer number (465658994).

Almost surely, 2^1396976979 is an apocalyptic number.

1396976979 is a deficient number, since it is larger than the sum of its proper divisors (465658997).

1396976979 is an equidigital number, since it uses as much as digits as its factorization.

1396976979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465658996.

The product of its digits is 34720812, while the sum is 66.

The square root of 1396976979 is about 37376.1552196049. The cubic root of 1396976979 is about 1117.8831665550.

The spelling of 1396976979 in words is "one billion, three hundred ninety-six million, nine hundred seventy-six thousand, nine hundred seventy-nine".