1157911939 has 4 divisors (see below), whose sum is σ = 1226024424. Its totient is φ = 1089799456.

The previous prime is 1157911897. The next prime is 1157911957. The reversal of 1157911939 is 9391197511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1157911939 - 2¹⁷ = 1157780867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157911999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34056217 + ... + 34056250.

It is an arithmetic number, because the mean of its divisors is an integer number (306506106).

Almost surely, 2^1157911939 is an apocalyptic number.

1157911939 is a deficient number, since it is larger than the sum of its proper divisors (68112485).

1157911939 is an equidigital number, since it uses as much as digits as its factorization.

1157911939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68112484.

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

The square root of 1157911939 is about 34028.1051338449. The cubic root of 1157911939 is about 1050.0867468770.

The spelling of 1157911939 in words is "one billion, one hundred fifty-seven million, nine hundred eleven thousand, nine hundred thirty-nine".