26913631 has 2 divisors, whose sum is σ = 26913632. Its totient is φ = 26913630.

The previous prime is 26913599. The next prime is 26913637. The reversal of 26913631 is 13631962.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26913631 - 2⁵ = 26913599 is a prime.

It is a super-2 number, since 2×26913631² = 1448687067208322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26913593 and 26913602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26913637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13456815 + 13456816.

It is an arithmetic number, because the mean of its divisors is an integer number (13456816).

Almost surely, 2^26913631 is an apocalyptic number.

26913631 is a deficient number, since it is larger than the sum of its proper divisors (1).

26913631 is an equidigital number, since it uses as much as digits as its factorization.

26913631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 26913631 is about 5187.8349048519. The cubic root of 26913631 is about 299.6797731189.

The spelling of 26913631 in words is "twenty-six million, nine hundred thirteen thousand, six hundred thirty-one".