26431693 has 2 divisors, whose sum is σ = 26431694. Its totient is φ = 26431692.

The previous prime is 26431681. The next prime is 26431697. The reversal of 26431693 is 39613462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26183689 + 248004 = 5117^2 + 498^2 .

It is a cyclic number.

It is not a de Polignac number, because 26431693 - 2⁵ = 26431661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26431697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13215846 + 13215847.

It is an arithmetic number, because the mean of its divisors is an integer number (13215847).

Almost surely, 2^26431693 is an apocalyptic number.

It is an amenable number.

26431693 is a deficient number, since it is larger than the sum of its proper divisors (1).

26431693 is an equidigital number, since it uses as much as digits as its factorization.

26431693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 26431693 is about 5141.1762272850. The cubic root of 26431693 is about 297.8802162608.

The spelling of 26431693 in words is "twenty-six million, four hundred thirty-one thousand, six hundred ninety-three".