26239397 has 2 divisors, whose sum is σ = 26239398. Its totient is φ = 26239396.

The previous prime is 26239351. The next prime is 26239427. The reversal of 26239397 is 79393262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23049601 + 3189796 = 4801^2 + 1786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26239397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26239337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13119698 + 13119699.

It is an arithmetic number, because the mean of its divisors is an integer number (13119699).

Almost surely, 2^26239397 is an apocalyptic number.

It is an amenable number.

26239397 is a deficient number, since it is larger than the sum of its proper divisors (1).

26239397 is an equidigital number, since it uses as much as digits as its factorization.

26239397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 41.

The square root of 26239397 is about 5122.4405316216. The cubic root of 26239397 is about 297.1560773893.

The spelling of 26239397 in words is "twenty-six million, two hundred thirty-nine thousand, three hundred ninety-seven".