26909397 has 12 divisors (see below), whose sum is σ = 39920140. Its totient is φ = 17454528.

The previous prime is 26909387. The next prime is 26909401. The reversal of 26909397 is 79390962.

It can be written as a sum of positive squares in 2 ways, for example, as 22410756 + 4498641 = 4734^2 + 2121^2 .

It is not a de Polignac number, because 26909397 - 2⁴ = 26909381 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 (26909327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40072 + ... + 40737.

Almost surely, 2^26909397 is an apocalyptic number.

It is an amenable number.

26909397 is a deficient number, since it is larger than the sum of its proper divisors (13010743).

26909397 is a wasteful number, since it uses less digits than its factorization.

26909397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80852 (or 80849 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 26909397 is about 5187.4268187609. The cubic root of 26909397 is about 299.6640572821.

The spelling of 26909397 in words is "twenty-six million, nine hundred nine thousand, three hundred ninety-seven".