115291969 has 16 divisors (see below), whose sum is σ = 126416080. Its totient is φ = 105131520.

The previous prime is 115291933. The next prime is 115292017. The reversal of 115291969 is 969192511.

It can be written as a sum of positive squares in 8 ways, for example, as 87329025 + 27962944 = 9345^2 + 5288^2 .

It is not a de Polignac number, because 115291969 - 2⁹ = 115291457 is a prime.

It is a super-2 number, since 2×115291969² = 26584476231793922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115291919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212839 + ... + 213379.

It is an arithmetic number, because the mean of its divisors is an integer number (7901005).

Almost surely, 2^115291969 is an apocalyptic number.

It is an amenable number.

115291969 is a deficient number, since it is larger than the sum of its proper divisors (11124111).

115291969 is an frugal number, since it uses more digits than its factorization.

115291969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 651 counting only the distinct ones).

The product of its digits is 43740, while the sum is 43.

The square root of 115291969 is about 10737.4097900751. The cubic root of 115291969 is about 486.7056099338.

The spelling of 115291969 in words is "one hundred fifteen million, two hundred ninety-one thousand, nine hundred sixty-nine".