1113431279 has 2 divisors, whose sum is σ = 1113431280. Its totient is φ = 1113431278.

The previous prime is 1113431273. The next prime is 1113431377. The reversal of 1113431279 is 9721343111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1113431279 - 2⁸ = 1113431023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113431273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556715639 + 556715640.

It is an arithmetic number, because the mean of its divisors is an integer number (556715640).

Almost surely, 2^1113431279 is an apocalyptic number.

1113431279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113431279 is an equidigital number, since it uses as much as digits as its factorization.

1113431279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 1113431279 is about 33368.1177023817. The cubic root of 1113431279 is about 1036.4645975373.

The spelling of 1113431279 in words is "one billion, one hundred thirteen million, four hundred thirty-one thousand, two hundred seventy-nine".