26161397 has 2 divisors, whose sum is σ = 26161398. Its totient is φ = 26161396.

The previous prime is 26161363. The next prime is 26161411. The reversal of 26161397 is 79316162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21893041 + 4268356 = 4679^2 + 2066^2 .

It is a cyclic number.

It is not a de Polignac number, because 26161397 - 2⁸ = 26161141 is a prime.

It is equal to p_1633976 and since 26161397 and 1633976 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26161307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13080698 + 13080699.

It is an arithmetic number, because the mean of its divisors is an integer number (13080699).

Almost surely, 2^26161397 is an apocalyptic number.

It is an amenable number.

26161397 is a deficient number, since it is larger than the sum of its proper divisors (1).

26161397 is an equidigital number, since it uses as much as digits as its factorization.

26161397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 26161397 is about 5114.8213067516. The cubic root of 26161397 is about 296.8613401951.

The spelling of 26161397 in words is "twenty-six million, one hundred sixty-one thousand, three hundred ninety-seven".