27742931 has 2 divisors, whose sum is σ = 27742932. Its totient is φ = 27742930.

The previous prime is 27742901. The next prime is 27742943. The reversal of 27742931 is 13924772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27742931 - 2⁶ = 27742867 is a prime.

It is a super-2 number, since 2×27742931² = 1539340440941522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27742891 and 27742900.

It is not a weakly prime, because it can be changed into another prime (27742901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13871465 + 13871466.

It is an arithmetic number, because the mean of its divisors is an integer number (13871466).

Almost surely, 2^27742931 is an apocalyptic number.

27742931 is a deficient number, since it is larger than the sum of its proper divisors (1).

27742931 is an equidigital number, since it uses as much as digits as its factorization.

27742931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 27742931 is about 5267.1558739039. The cubic root of 27742931 is about 302.7267375501.

The spelling of 27742931 in words is "twenty-seven million, seven hundred forty-two thousand, nine hundred thirty-one".