27798623 has 2 divisors, whose sum is σ = 27798624. Its totient is φ = 27798622.

The previous prime is 27798613. The next prime is 27798629. The reversal of 27798623 is 32689772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27798623 - 2⁴ = 27798607 is a prime.

It is a super-2 number, since 2×27798623² = 1545526881392258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27798629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13899311 + 13899312.

It is an arithmetic number, because the mean of its divisors is an integer number (13899312).

Almost surely, 2^27798623 is an apocalyptic number.

27798623 is a deficient number, since it is larger than the sum of its proper divisors (1).

27798623 is an equidigital number, since it uses as much as digits as its factorization.

27798623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 27798623 is about 5272.4399475006. The cubic root of 27798623 is about 302.9291697618.

The spelling of 27798623 in words is "twenty-seven million, seven hundred ninety-eight thousand, six hundred twenty-three".