26487631 has 2 divisors, whose sum is σ = 26487632. Its totient is φ = 26487630.

The previous prime is 26487619. The next prime is 26487641. The reversal of 26487631 is 13678462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26487631 - 2¹⁵ = 26454863 is a prime.

It is a super-2 number, since 2×26487631² = 1403189191984322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26487611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13243815 + 13243816.

It is an arithmetic number, because the mean of its divisors is an integer number (13243816).

Almost surely, 2^26487631 is an apocalyptic number.

26487631 is a deficient number, since it is larger than the sum of its proper divisors (1).

26487631 is an equidigital number, since it uses as much as digits as its factorization.

26487631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 26487631 is about 5146.6135467898. The cubic root of 26487631 is about 298.0902051140.

The spelling of 26487631 in words is "twenty-six million, four hundred eighty-seven thousand, six hundred thirty-one".