27798913 has 2 divisors, whose sum is σ = 27798914. Its totient is φ = 27798912.

The previous prime is 27798899. The next prime is 27798917. The reversal of 27798913 is 31989772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27751824 + 47089 = 5268^2 + 217^2 .

It is a cyclic number.

It is not a de Polignac number, because 27798913 - 2⁹ = 27798401 is a prime.

It is not a weakly prime, because it can be changed into another prime (27798917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13899456 + 13899457.

It is an arithmetic number, because the mean of its divisors is an integer number (13899457).

Almost surely, 2^27798913 is an apocalyptic number.

It is an amenable number.

27798913 is a deficient number, since it is larger than the sum of its proper divisors (1).

27798913 is an equidigital number, since it uses as much as digits as its factorization.

27798913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 27798913 is about 5272.4674489275. The cubic root of 27798913 is about 302.9302231611.

The spelling of 27798913 in words is "twenty-seven million, seven hundred ninety-eight thousand, nine hundred thirteen".