26157697 has 2 divisors, whose sum is σ = 26157698. Its totient is φ = 26157696.

The previous prime is 26157689. The next prime is 26157701. The reversal of 26157697 is 79675162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22619536 + 3538161 = 4756^2 + 1881^2 .

It is a cyclic number.

It is not a de Polignac number, because 26157697 - 2³ = 26157689 is a prime.

It is a super-2 number, since 2×26157697² = 1368450224687618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26157617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13078848 + 13078849.

It is an arithmetic number, because the mean of its divisors is an integer number (13078849).

Almost surely, 2^26157697 is an apocalyptic number.

It is an amenable number.

26157697 is a deficient number, since it is larger than the sum of its proper divisors (1).

26157697 is an equidigital number, since it uses as much as digits as its factorization.

26157697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 26157697 is about 5114.4595999969. The cubic root of 26157697 is about 296.8473445263.

The spelling of 26157697 in words is "twenty-six million, one hundred fifty-seven thousand, six hundred ninety-seven".