1139973157 has 2 divisors, whose sum is σ = 1139973158. Its totient is φ = 1139973156.

The previous prime is 1139973103. The next prime is 1139973179. The reversal of 1139973157 is 7513799311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861950881 + 278022276 = 29359^2 + 16674^2 .

It is an emirp because it is prime and its reverse (7513799311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139973157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139973187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569986578 + 569986579.

It is an arithmetic number, because the mean of its divisors is an integer number (569986579).

Almost surely, 2^1139973157 is an apocalyptic number.

It is an amenable number.

1139973157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139973157 is an equidigital number, since it uses as much as digits as its factorization.

1139973157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 178605, while the sum is 46.

The square root of 1139973157 is about 33763.4885194051. The cubic root of 1139973157 is about 1044.6357275249.

The spelling of 1139973157 in words is "one billion, one hundred thirty-nine million, nine hundred seventy-three thousand, one hundred fifty-seven".