27431969 has 2 divisors, whose sum is σ = 27431970. Its totient is φ = 27431968.

The previous prime is 27431959. The next prime is 27431977. The reversal of 27431969 is 96913472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13778944 + 13653025 = 3712^2 + 3695^2 .

It is a cyclic number.

It is not a de Polignac number, because 27431969 - 2¹⁶ = 27366433 is a prime.

It is a super-2 number, since 2×27431969² = 1505025846433922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27431909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13715984 + 13715985.

It is an arithmetic number, because the mean of its divisors is an integer number (13715985).

Almost surely, 2^27431969 is an apocalyptic number.

It is an amenable number.

27431969 is a deficient number, since it is larger than the sum of its proper divisors (1).

27431969 is an equidigital number, since it uses as much as digits as its factorization.

27431969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 27431969 is about 5237.5537228748. The cubic root of 27431969 is about 301.5914281125.

The spelling of 27431969 in words is "twenty-seven million, four hundred thirty-one thousand, nine hundred sixty-nine".