27980497 has 2 divisors, whose sum is σ = 27980498. Its totient is φ = 27980496.

The previous prime is 27980471. The next prime is 27980503. The reversal of 27980497 is 79408972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26998416 + 982081 = 5196^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 27980497 - 2¹⁵ = 27947729 is a prime.

It is not a weakly prime, because it can be changed into another prime (27980297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13990248 + 13990249.

It is an arithmetic number, because the mean of its divisors is an integer number (13990249).

Almost surely, 2^27980497 is an apocalyptic number.

It is an amenable number.

27980497 is a deficient number, since it is larger than the sum of its proper divisors (1).

27980497 is an equidigital number, since it uses as much as digits as its factorization.

27980497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 27980497 is about 5289.6594408336. The cubic root of 27980497 is about 303.5883777230.

The spelling of 27980497 in words is "twenty-seven million, nine hundred eighty thousand, four hundred ninety-seven".