1396113891 has 4 divisors (see below), whose sum is σ = 1861485192. Its totient is φ = 930742592.

The previous prime is 1396113883. The next prime is 1396113973. The reversal of 1396113891 is 1983116931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1983116931 = 3 ⋅661038977.

It is a cyclic number.

It is not a de Polignac number, because 1396113891 - 2³ = 1396113883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1396113811) 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, 232685646 + ... + 232685651.

It is an arithmetic number, because the mean of its divisors is an integer number (465371298).

Almost surely, 2^1396113891 is an apocalyptic number.

1396113891 is a deficient number, since it is larger than the sum of its proper divisors (465371301).

1396113891 is an equidigital number, since it uses as much as digits as its factorization.

1396113891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465371300.

The product of its digits is 34992, while the sum is 42.

The square root of 1396113891 is about 37364.6074648189. The cubic root of 1396113891 is about 1117.6529002184.

The spelling of 1396113891 in words is "one billion, three hundred ninety-six million, one hundred thirteen thousand, eight hundred ninety-one".