26613491 has 2 divisors, whose sum is σ = 26613492. Its totient is φ = 26613490.

The previous prime is 26613467. The next prime is 26613511. The reversal of 26613491 is 19431662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26613491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26613401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13306745 + 13306746.

It is an arithmetic number, because the mean of its divisors is an integer number (13306746).

Almost surely, 2^26613491 is an apocalyptic number.

26613491 is a deficient number, since it is larger than the sum of its proper divisors (1).

26613491 is an equidigital number, since it uses as much as digits as its factorization.

26613491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 26613491 is about 5158.8265138498. The cubic root of 26613491 is about 298.5615995548.

The spelling of 26613491 in words is "twenty-six million, six hundred thirteen thousand, four hundred ninety-one".