115172399 has 4 divisors (see below), whose sum is σ = 121947264. Its totient is φ = 108397536.

The previous prime is 115172389. The next prime is 115172429. The reversal of 115172399 is 993271511.

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 115172399 - 2⁴ = 115172383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115172389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387407 + ... + 3387440.

It is an arithmetic number, because the mean of its divisors is an integer number (30486816).

Almost surely, 2^115172399 is an apocalyptic number.

115172399 is a deficient number, since it is larger than the sum of its proper divisors (6774865).

115172399 is an equidigital number, since it uses as much as digits as its factorization.

115172399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6774864.

The product of its digits is 17010, while the sum is 38.

The square root of 115172399 is about 10731.8404293020. The cubic root of 115172399 is about 486.5372966213.

The spelling of 115172399 in words is "one hundred fifteen million, one hundred seventy-two thousand, three hundred ninety-nine".