27725917 has 2 divisors, whose sum is σ = 27725918. Its totient is φ = 27725916.

The previous prime is 27725909. The next prime is 27725941. The reversal of 27725917 is 71952772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26687556 + 1038361 = 5166^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 27725917 - 2³ = 27725909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27725917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27725017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13862958 + 13862959.

It is an arithmetic number, because the mean of its divisors is an integer number (13862959).

Almost surely, 2^27725917 is an apocalyptic number.

It is an amenable number.

27725917 is a deficient number, since it is larger than the sum of its proper divisors (1).

27725917 is an equidigital number, since it uses as much as digits as its factorization.

27725917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61740, while the sum is 40.

The square root of 27725917 is about 5265.5405230612. The cubic root of 27725917 is about 302.6648401491.

The spelling of 27725917 in words is "twenty-seven million, seven hundred twenty-five thousand, nine hundred seventeen".