26863157 has 2 divisors, whose sum is σ = 26863158. Its totient is φ = 26863156.

The previous prime is 26863153. The next prime is 26863201. The reversal of 26863157 is 75136862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26306641 + 556516 = 5129^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 26863157 - 2² = 26863153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26863157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26863153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13431578 + 13431579.

It is an arithmetic number, because the mean of its divisors is an integer number (13431579).

Almost surely, 2^26863157 is an apocalyptic number.

It is an amenable number.

26863157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26863157 is an equidigital number, since it uses as much as digits as its factorization.

26863157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 26863157 is about 5182.9679721179. The cubic root of 26863157 is about 299.4923154132.

The spelling of 26863157 in words is "twenty-six million, eight hundred sixty-three thousand, one hundred fifty-seven".