27920461 has 2 divisors, whose sum is σ = 27920462. Its totient is φ = 27920460.

The previous prime is 27920449. The next prime is 27920471. The reversal of 27920461 is 16402972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22857961 + 5062500 = 4781^2 + 2250^2 .

It is a cyclic number.

It is not a de Polignac number, because 27920461 - 2¹¹ = 27918413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27920471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13960230 + 13960231.

It is an arithmetic number, because the mean of its divisors is an integer number (13960231).

Almost surely, 2^27920461 is an apocalyptic number.

It is an amenable number.

27920461 is a deficient number, since it is larger than the sum of its proper divisors (1).

27920461 is an equidigital number, since it uses as much as digits as its factorization.

27920461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 27920461 is about 5283.9815480374. The cubic root of 27920461 is about 303.3710920539.

The spelling of 27920461 in words is "twenty-seven million, nine hundred twenty thousand, four hundred sixty-one".