27928679 has 2 divisors, whose sum is σ = 27928680. Its totient is φ = 27928678.

The previous prime is 27928657. The next prime is 27928687. The reversal of 27928679 is 97682972.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27928679 is a prime.

It is a super-2 number, since 2×27928679² = 1560022221370082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27928619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13964339 + 13964340.

It is an arithmetic number, because the mean of its divisors is an integer number (13964340).

Almost surely, 2^27928679 is an apocalyptic number.

27928679 is a deficient number, since it is larger than the sum of its proper divisors (1).

27928679 is an equidigital number, since it uses as much as digits as its factorization.

27928679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The square root of 27928679 is about 5284.7591241229. The cubic root of 27928679 is about 303.4008534903.

The spelling of 27928679 in words is "twenty-seven million, nine hundred twenty-eight thousand, six hundred seventy-nine".