26549431 has 2 divisors, whose sum is σ = 26549432. Its totient is φ = 26549430.

The previous prime is 26549401. The next prime is 26549437. The reversal of 26549431 is 13494562.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26549431 - 2⁵ = 26549399 is a prime.

It is a super-2 number, since 2×26549431² = 1409744572847522, which contains 22 as substring.

It is equal to p_1656727 and since 26549431 and 1656727 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26549437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13274715 + 13274716.

It is an arithmetic number, because the mean of its divisors is an integer number (13274716).

Almost surely, 2^26549431 is an apocalyptic number.

26549431 is a deficient number, since it is larger than the sum of its proper divisors (1).

26549431 is an equidigital number, since it uses as much as digits as its factorization.

26549431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 26549431 is about 5152.6139967981. The cubic root of 26549431 is about 298.3218562074.

The spelling of 26549431 in words is "twenty-six million, five hundred forty-nine thousand, four hundred thirty-one".