27997183321 has 2 divisors, whose sum is σ = 27997183322. Its totient is φ = 27997183320.

The previous prime is 27997183271. The next prime is 27997183327. The reversal of 27997183321 is 12338179972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27023743321 + 973440000 = 164389^2 + 31200^2 .

It is a cyclic number.

It is not a de Polignac number, because 27997183321 - 2⁹ = 27997182809 is a prime.

It is not a weakly prime, because it can be changed into another prime (27997183327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13998591660 + 13998591661.

It is an arithmetic number, because the mean of its divisors is an integer number (13998591661).

Almost surely, 2^27997183321 is an apocalyptic number.

It is an amenable number.

27997183321 is a deficient number, since it is larger than the sum of its proper divisors (1).

27997183321 is an equidigital number, since it uses as much as digits as its factorization.

27997183321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 52.

The spelling of 27997183321 in words is "twenty-seven billion, nine hundred ninety-seven million, one hundred eighty-three thousand, three hundred twenty-one".