27920293 has 2 divisors, whose sum is σ = 27920294. Its totient is φ = 27920292.

The previous prime is 27920281. The next prime is 27920309. The reversal of 27920293 is 39202972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20775364 + 7144929 = 4558^2 + 2673^2 .

It is a cyclic number.

It is not a de Polignac number, because 27920293 - 2²¹ = 25823141 is a prime.

It is a super-2 number, since 2×27920293² = 1559085522411698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27920093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13960146 + 13960147.

It is an arithmetic number, because the mean of its divisors is an integer number (13960147).

Almost surely, 2^27920293 is an apocalyptic number.

It is an amenable number.

27920293 is a deficient number, since it is larger than the sum of its proper divisors (1).

27920293 is an equidigital number, since it uses as much as digits as its factorization.

27920293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 27920293 is about 5283.9656509103. The cubic root of 27920293 is about 303.3704835820.

The spelling of 27920293 in words is "twenty-seven million, nine hundred twenty thousand, two hundred ninety-three".