27730631 has 2 divisors, whose sum is σ = 27730632. Its totient is φ = 27730630.

The previous prime is 27730627. The next prime is 27730667. The reversal of 27730631 is 13603772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27730631 - 2² = 27730627 is a prime.

It is a super-2 number, since 2×27730631² = 1537975791316322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27730594 and 27730603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27730601) 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, 13865315 + 13865316.

It is an arithmetic number, because the mean of its divisors is an integer number (13865316).

Almost surely, 2^27730631 is an apocalyptic number.

27730631 is a deficient number, since it is larger than the sum of its proper divisors (1).

27730631 is an equidigital number, since it uses as much as digits as its factorization.

27730631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 27730631 is about 5265.9881313957. The cubic root of 27730631 is about 302.6819923465.

The spelling of 27730631 in words is "twenty-seven million, seven hundred thirty thousand, six hundred thirty-one".