26149693 has 2 divisors, whose sum is σ = 26149694. Its totient is φ = 26149692.

The previous prime is 26149691. The next prime is 26149699. The reversal of 26149693 is 39694162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25786084 + 363609 = 5078^2 + 603^2 .

It is a cyclic number.

It is not a de Polignac number, because 26149693 - 2¹ = 26149691 is a prime.

Together with 26149691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26149691) 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, 13074846 + 13074847.

It is an arithmetic number, because the mean of its divisors is an integer number (13074847).

Almost surely, 2^26149693 is an apocalyptic number.

It is an amenable number.

26149693 is a deficient number, since it is larger than the sum of its proper divisors (1).

26149693 is an equidigital number, since it uses as much as digits as its factorization.

26149693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 26149693 is about 5113.6770527674. The cubic root of 26149693 is about 296.8170639741.

The spelling of 26149693 in words is "twenty-six million, one hundred forty-nine thousand, six hundred ninety-three".