26113991 has 2 divisors, whose sum is σ = 26113992. Its totient is φ = 26113990.

The previous prime is 26113979. The next prime is 26114047. The reversal of 26113991 is 19931162.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26113991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26113951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13056995 + 13056996.

It is an arithmetic number, because the mean of its divisors is an integer number (13056996).

Almost surely, 2^26113991 is an apocalyptic number.

26113991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26113991 is an equidigital number, since it uses as much as digits as its factorization.

26113991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 32.

The square root of 26113991 is about 5110.1850260044. The cubic root of 26113991 is about 296.6819216720.

The spelling of 26113991 in words is "twenty-six million, one hundred thirteen thousand, nine hundred ninety-one".