27390997 has 2 divisors, whose sum is σ = 27390998. Its totient is φ = 27390996.

The previous prime is 27390991. The next prime is 27391003. The reversal of 27390997 is 79909372.

It is a balanced prime because it is at equal distance from previous prime (27390991) and next prime (27391003).

It can be written as a sum of positive squares in only one way, i.e., 24147396 + 3243601 = 4914^2 + 1801^2 .

It is a cyclic number.

It is not a de Polignac number, because 27390997 - 2¹⁹ = 26866709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27390991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13695498 + 13695499.

It is an arithmetic number, because the mean of its divisors is an integer number (13695499).

Almost surely, 2^27390997 is an apocalyptic number.

It is an amenable number.

27390997 is a deficient number, since it is larger than the sum of its proper divisors (1).

27390997 is an equidigital number, since it uses as much as digits as its factorization.

27390997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 27390997 is about 5233.6408932979. The cubic root of 27390997 is about 301.4412024022.

The spelling of 27390997 in words is "twenty-seven million, three hundred ninety thousand, nine hundred ninety-seven".