26112991 has 2 divisors, whose sum is σ = 26112992. Its totient is φ = 26112990.

The previous prime is 26112971. The next prime is 26113033. The reversal of 26112991 is 19921162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26112991 - 2²¹ = 24015839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26112971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13056495 + 13056496.

It is an arithmetic number, because the mean of its divisors is an integer number (13056496).

Almost surely, 2^26112991 is an apocalyptic number.

26112991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26112991 is an equidigital number, since it uses as much as digits as its factorization.

26112991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 31.

The square root of 26112991 is about 5110.0871812524. The cubic root of 26112991 is about 296.6781346126.

The spelling of 26112991 in words is "twenty-six million, one hundred twelve thousand, nine hundred ninety-one".