26291957 has 2 divisors, whose sum is σ = 26291958. Its totient is φ = 26291956.

The previous prime is 26291927. The next prime is 26291959. The reversal of 26291957 is 75919262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24512401 + 1779556 = 4951^2 + 1334^2 .

It is a cyclic number.

It is not a de Polignac number, because 26291957 - 2¹⁰ = 26290933 is a prime.

Together with 26291959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26291959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13145978 + 13145979.

It is an arithmetic number, because the mean of its divisors is an integer number (13145979).

Almost surely, 2^26291957 is an apocalyptic number.

It is an amenable number.

26291957 is a deficient number, since it is larger than the sum of its proper divisors (1).

26291957 is an equidigital number, since it uses as much as digits as its factorization.

26291957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 26291957 is about 5127.5683320654. The cubic root of 26291957 is about 297.3543556571.

The spelling of 26291957 in words is "twenty-six million, two hundred ninety-one thousand, nine hundred fifty-seven".