27725491 has 2 divisors, whose sum is σ = 27725492. Its totient is φ = 27725490.

The previous prime is 27725483. The next prime is 27725527. The reversal of 27725491 is 19452772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27725491 - 2³ = 27725483 is a prime.

It is a Chen prime.

It is the 5266-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 27725491.

It is not a weakly prime, because it can be changed into another prime (27725431) by changing a digit.

It is a nontrivial repunit in base 5265.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13862745 + 13862746.

It is an arithmetic number, because the mean of its divisors is an integer number (13862746).

Almost surely, 2^27725491 is an apocalyptic number.

27725491 is a deficient number, since it is larger than the sum of its proper divisors (1).

27725491 is an equidigital number, since it uses as much as digits as its factorization.

27725491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 27725491 is about 5265.5000712183. The cubic root of 27725491 is about 302.6632900245.

The spelling of 27725491 in words is "twenty-seven million, seven hundred twenty-five thousand, four hundred ninety-one".