1163156999 has 2 divisors, whose sum is σ = 1163157000. Its totient is φ = 1163156998.

The previous prime is 1163156993. The next prime is 1163157001. The reversal of 1163156999 is 9996513611.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1163156999 is a prime.

It is a Sophie Germain prime.

Together with 1163157001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1163156993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581578499 + 581578500.

It is an arithmetic number, because the mean of its divisors is an integer number (581578500).

Almost surely, 2^1163156999 is an apocalyptic number.

1163156999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163156999 is an equidigital number, since it uses as much as digits as its factorization.

1163156999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 50.

The square root of 1163156999 is about 34105.0875823535. The cubic root of 1163156999 is about 1051.6699048554.

The spelling of 1163156999 in words is "one billion, one hundred sixty-three million, one hundred fifty-six thousand, nine hundred ninety-nine".