26115897 has 4 divisors (see below), whose sum is σ = 34821200. Its totient is φ = 17410596.

The previous prime is 26115889. The next prime is 26115911. The reversal of 26115897 is 79851162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26115897 - 2³ = 26115889 is a prime.

It is a super-2 number, since 2×26115897² = 1364080152229218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26115497) 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, 4352647 + ... + 4352652.

It is an arithmetic number, because the mean of its divisors is an integer number (8705300).

Almost surely, 2^26115897 is an apocalyptic number.

It is an amenable number.

26115897 is a deficient number, since it is larger than the sum of its proper divisors (8705303).

26115897 is an equidigital number, since it uses as much as digits as its factorization.

26115897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8705302.

The product of its digits is 30240, while the sum is 39.

The square root of 26115897 is about 5110.3715129137. The cubic root of 26115897 is about 296.6891395396.

The spelling of 26115897 in words is "twenty-six million, one hundred fifteen thousand, eight hundred ninety-seven".