27920531 has 2 divisors, whose sum is σ = 27920532. Its totient is φ = 27920530.

The previous prime is 27920527. The next prime is 27920561. The reversal of 27920531 is 13502972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27920531 - 2² = 27920527 is a prime.

It is a super-2 number, since 2×27920531² = 1559112102643922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27920494 and 27920503.

It is not a weakly prime, because it can be changed into another prime (27920561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13960265 + 13960266.

It is an arithmetic number, because the mean of its divisors is an integer number (13960266).

Almost surely, 2^27920531 is an apocalyptic number.

27920531 is a deficient number, since it is larger than the sum of its proper divisors (1).

27920531 is an equidigital number, since it uses as much as digits as its factorization.

27920531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 27920531 is about 5283.9881718263. The cubic root of 27920531 is about 303.3713455831.

The spelling of 27920531 in words is "twenty-seven million, nine hundred twenty thousand, five hundred thirty-one".