1391118983 has 2 divisors, whose sum is σ = 1391118984. Its totient is φ = 1391118982.

The previous prime is 1391118977. The next prime is 1391119003. The reversal of 1391118983 is 3898111931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1391118983 - 2²⁴ = 1374341767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391118943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695559491 + 695559492.

It is an arithmetic number, because the mean of its divisors is an integer number (695559492).

Almost surely, 2^1391118983 is an apocalyptic number.

1391118983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391118983 is an equidigital number, since it uses as much as digits as its factorization.

1391118983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 44.

The square root of 1391118983 is about 37297.7074764656. The cubic root of 1391118983 is about 1116.3184235338.

The spelling of 1391118983 in words is "one billion, three hundred ninety-one million, one hundred eighteen thousand, nine hundred eighty-three".