26231657 has 2 divisors, whose sum is σ = 26231658. Its totient is φ = 26231656.

The previous prime is 26231641. The next prime is 26231669. The reversal of 26231657 is 75613262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15335056 + 10896601 = 3916^2 + 3301^2 .

It is a cyclic number.

It is not a de Polignac number, because 26231657 - 2⁴ = 26231641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26231617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13115828 + 13115829.

It is an arithmetic number, because the mean of its divisors is an integer number (13115829).

Almost surely, 2^26231657 is an apocalyptic number.

It is an amenable number.

26231657 is a deficient number, since it is larger than the sum of its proper divisors (1).

26231657 is an equidigital number, since it uses as much as digits as its factorization.

26231657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 26231657 is about 5121.6849766459. The cubic root of 26231657 is about 297.1268565168.

The spelling of 26231657 in words is "twenty-six million, two hundred thirty-one thousand, six hundred fifty-seven".