26979257 has 2 divisors, whose sum is σ = 26979258. Its totient is φ = 26979256.

The previous prime is 26979223. The next prime is 26979283. The reversal of 26979257 is 75297962.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24960016 + 2019241 = 4996^2 + 1421^2 .

It is a cyclic number.

It is not a de Polignac number, because 26979257 - 2¹² = 26975161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26979287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13489628 + 13489629.

It is an arithmetic number, because the mean of its divisors is an integer number (13489629).

Almost surely, 2^26979257 is an apocalyptic number.

It is an amenable number.

26979257 is a deficient number, since it is larger than the sum of its proper divisors (1).

26979257 is an equidigital number, since it uses as much as digits as its factorization.

26979257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 47.

The square root of 26979257 is about 5194.1560430930. The cubic root of 26979257 is about 299.9231543916.

The spelling of 26979257 in words is "twenty-six million, nine hundred seventy-nine thousand, two hundred fifty-seven".