1157991319 has 2 divisors, whose sum is σ = 1157991320. Its totient is φ = 1157991318.

The previous prime is 1157991313. The next prime is 1157991353. The reversal of 1157991319 is 9131997511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1157991319 - 2⁵ = 1157991287 is a prime.

It is a super-2 number, since 2×1157991319² = 2681887789758719522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157991313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578995659 + 578995660.

It is an arithmetic number, because the mean of its divisors is an integer number (578995660).

Almost surely, 2^1157991319 is an apocalyptic number.

1157991319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157991319 is an equidigital number, since it uses as much as digits as its factorization.

1157991319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76545, while the sum is 46.

The square root of 1157991319 is about 34029.2715026343. The cubic root of 1157991319 is about 1050.1107423636.

The spelling of 1157991319 in words is "one billion, one hundred fifty-seven million, nine hundred ninety-one thousand, three hundred nineteen".