1158162991 has 2 divisors, whose sum is σ = 1158162992. Its totient is φ = 1158162990.

The previous prime is 1158162977. The next prime is 1158163073. The reversal of 1158162991 is 1992618511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1158162991 - 2⁹ = 1158162479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1158162931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579081495 + 579081496.

It is an arithmetic number, because the mean of its divisors is an integer number (579081496).

Almost surely, 2^1158162991 is an apocalyptic number.

1158162991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1158162991 is an equidigital number, since it uses as much as digits as its factorization.

1158162991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 43.

The square root of 1158162991 is about 34031.7938257742. The cubic root of 1158162991 is about 1050.1626327075.

The spelling of 1158162991 in words is "one billion, one hundred fifty-eight million, one hundred sixty-two thousand, nine hundred ninety-one".