26715431 has 2 divisors, whose sum is σ = 26715432. Its totient is φ = 26715430.

The previous prime is 26715413. The next prime is 26715433. The reversal of 26715431 is 13451762.

Together with previous prime (26715413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26715431 is a prime.

It is a super-2 number, since 2×26715431² = 1427428507031522, which contains 22 as substring.

Together with 26715433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26715394 and 26715403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26715433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13357715 + 13357716.

It is an arithmetic number, because the mean of its divisors is an integer number (13357716).

Almost surely, 2^26715431 is an apocalyptic number.

26715431 is a deficient number, since it is larger than the sum of its proper divisors (1).

26715431 is an equidigital number, since it uses as much as digits as its factorization.

26715431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 26715431 is about 5168.6972246399. The cubic root of 26715431 is about 298.9423161392.

The spelling of 26715431 in words is "twenty-six million, seven hundred fifteen thousand, four hundred thirty-one".