27423997 has 2 divisors, whose sum is σ = 27423998. Its totient is φ = 27423996.

The previous prime is 27423961. The next prime is 27424013. The reversal of 27423997 is 79932472.

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., 27394756 + 29241 = 5234^2 + 171^2 .

It is a cyclic number.

It is not a de Polignac number, because 27423997 - 2¹⁹ = 26899709 is a prime.

It is a super-2 number, since 2×27423997² = 1504151222912018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27423917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13711998 + 13711999.

It is an arithmetic number, because the mean of its divisors is an integer number (13711999).

Almost surely, 2^27423997 is an apocalyptic number.

It is an amenable number.

27423997 is a deficient number, since it is larger than the sum of its proper divisors (1).

27423997 is an equidigital number, since it uses as much as digits as its factorization.

27423997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 27423997 is about 5236.7926252621. The cubic root of 27423997 is about 301.5622101369.

The spelling of 27423997 in words is "twenty-seven million, four hundred twenty-three thousand, nine hundred ninety-seven".