26489431 has 2 divisors, whose sum is σ = 26489432. Its totient is φ = 26489430.

The previous prime is 26489423. The next prime is 26489459. The reversal of 26489431 is 13498462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26489431 - 2³ = 26489423 is a prime.

It is a super-2 number, since 2×26489431² = 1403379909407522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26489131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13244715 + 13244716.

It is an arithmetic number, because the mean of its divisors is an integer number (13244716).

Almost surely, 2^26489431 is an apocalyptic number.

26489431 is a deficient number, since it is larger than the sum of its proper divisors (1).

26489431 is an equidigital number, since it uses as much as digits as its factorization.

26489431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 26489431 is about 5146.7884160902. The cubic root of 26489431 is about 298.0969573249.

The spelling of 26489431 in words is "twenty-six million, four hundred eighty-nine thousand, four hundred thirty-one".