27245400397 has 2 divisors, whose sum is σ = 27245400398. Its totient is φ = 27245400396.

The previous prime is 27245400337. The next prime is 27245400407. The reversal of 27245400397 is 79300454272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24271770436 + 2973629961 = 155794^2 + 54531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27245400397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27245400317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13622700198 + 13622700199.

It is an arithmetic number, because the mean of its divisors is an integer number (13622700199).

Almost surely, 2^27245400397 is an apocalyptic number.

It is an amenable number.

27245400397 is a deficient number, since it is larger than the sum of its proper divisors (1).

27245400397 is an equidigital number, since it uses as much as digits as its factorization.

27245400397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 27245400397 in words is "twenty-seven billion, two hundred forty-five million, four hundred thousand, three hundred ninety-seven".