26851897 has 6 divisors (see below), whose sum is σ = 27063582. Its totient is φ = 26641152.

The previous prime is 26851873. The next prime is 26851919. The reversal of 26851897 is 79815862.

It can be written as a sum of positive squares in 3 ways, for example, as 2359296 + 24492601 = 1536^2 + 4949^2 .

It is not a de Polignac number, because 26851897 - 2¹⁵ = 26819129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26851837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71803 + ... + 72175.

It is an arithmetic number, because the mean of its divisors is an integer number (4510597).

Almost surely, 2^26851897 is an apocalyptic number.

It is an amenable number.

26851897 is a deficient number, since it is larger than the sum of its proper divisors (211685).

26851897 is an frugal number, since it uses more digits than its factorization.

26851897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 566 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 26851897 is about 5181.8816080648. The cubic root of 26851897 is about 299.4504643536.

The spelling of 26851897 in words is "twenty-six million, eight hundred fifty-one thousand, eight hundred ninety-seven".