26197331 has 2 divisors, whose sum is σ = 26197332. Its totient is φ = 26197330.

The previous prime is 26197321. The next prime is 26197343. The reversal of 26197331 is 13379162.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26197331 - 2⁶ = 26197267 is a prime.

It is a super-2 number, since 2×26197331² = 1372600303047122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26197321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13098665 + 13098666.

It is an arithmetic number, because the mean of its divisors is an integer number (13098666).

Almost surely, 2^26197331 is an apocalyptic number.

26197331 is a deficient number, since it is larger than the sum of its proper divisors (1).

26197331 is an equidigital number, since it uses as much as digits as its factorization.

26197331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 26197331 is about 5118.3328340388. The cubic root of 26197331 is about 296.9971960268.

The spelling of 26197331 in words is "twenty-six million, one hundred ninety-seven thousand, three hundred thirty-one".