1139973187 has 2 divisors, whose sum is σ = 1139973188. Its totient is φ = 1139973186.

The previous prime is 1139973181. The next prime is 1139973217. The reversal of 1139973187 is 7813799311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1139973187 - 2³ = 1139973179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1139973187.

It is not a weakly prime, because it can be changed into another prime (1139973181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569986593 + 569986594.

It is an arithmetic number, because the mean of its divisors is an integer number (569986594).

Almost surely, 2^1139973187 is an apocalyptic number.

1139973187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139973187 is an equidigital number, since it uses as much as digits as its factorization.

1139973187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 49.

The square root of 1139973187 is about 33763.4889636720. The cubic root of 1139973187 is about 1044.6357366886.

The spelling of 1139973187 in words is "one billion, one hundred thirty-nine million, nine hundred seventy-three thousand, one hundred eighty-seven".