1399911179 has 2 divisors, whose sum is σ = 1399911180. Its totient is φ = 1399911178.

The previous prime is 1399911167. The next prime is 1399911197. The reversal of 1399911179 is 9711199931.

It is a happy number.

Together with next prime (1399911197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1399911179 - 2⁸ = 1399910923 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1399911119) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699955589 + 699955590.

It is an arithmetic number, because the mean of its divisors is an integer number (699955590).

Almost surely, 2^1399911179 is an apocalyptic number.

1399911179 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399911179 is an equidigital number, since it uses as much as digits as its factorization.

1399911179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137781, while the sum is 50.

The square root of 1399911179 is about 37415.3869283748. The cubic root of 1399911179 is about 1118.6652837071.

The spelling of 1399911179 in words is "one billion, three hundred ninety-nine million, nine hundred eleven thousand, one hundred seventy-nine".