1396634279 has 4 divisors (see below), whose sum is σ = 1399479240. Its totient is φ = 1393789320.

The previous prime is 1396634249. The next prime is 1396634339. The reversal of 1396634279 is 9724366931.

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

It is a cyclic number.

It is not a de Polignac number, because 1396634279 - 2²⁸ = 1128198823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396634219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421744 + ... + 1422725.

It is an arithmetic number, because the mean of its divisors is an integer number (349869810).

Almost surely, 2^1396634279 is an apocalyptic number.

1396634279 is a deficient number, since it is larger than the sum of its proper divisors (2844961).

1396634279 is an equidigital number, since it uses as much as digits as its factorization.

1396634279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844960.

The product of its digits is 1469664, while the sum is 50.

The square root of 1396634279 is about 37371.5704647263. The cubic root of 1396634279 is about 1117.7917477514.

The spelling of 1396634279 in words is "one billion, three hundred ninety-six million, six hundred thirty-four thousand, two hundred seventy-nine".