1913157969 has 8 divisors (see below), whose sum is σ = 2551344000. Its totient is φ = 1275205296.

The previous prime is 1913157959. The next prime is 1913157989. The reversal of 1913157969 is 9697513191.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1913157969 - 2¹² = 1913153873 is a prime.

It is a super-2 number, since 2×1913157969² = 7320346828696409922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1913157919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38217 + ... + 72710.

It is an arithmetic number, because the mean of its divisors is an integer number (318918000).

Almost surely, 2^1913157969 is an apocalyptic number.

It is an amenable number.

1913157969 is a deficient number, since it is larger than the sum of its proper divisors (638186031).

1913157969 is a wasteful number, since it uses less digits than its factorization.

1913157969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116679.

The product of its digits is 459270, while the sum is 51.

The square root of 1913157969 is about 43739.6612812674. The cubic root of 1913157969 is about 1241.4148714974.

The spelling of 1913157969 in words is "one billion, nine hundred thirteen million, one hundred fifty-seven thousand, nine hundred sixty-nine".