27976333421 has 2 divisors, whose sum is σ = 27976333422. Its totient is φ = 27976333420.

The previous prime is 27976333387. The next prime is 27976333447. The reversal of 27976333421 is 12433367972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26053510921 + 1922822500 = 161411^2 + 43850^2 .

It is a cyclic number.

It is not a de Polignac number, because 27976333421 - 2¹⁴ = 27976317037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27976333471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13988166710 + 13988166711.

It is an arithmetic number, because the mean of its divisors is an integer number (13988166711).

Almost surely, 2^27976333421 is an apocalyptic number.

It is an amenable number.

27976333421 is a deficient number, since it is larger than the sum of its proper divisors (1).

27976333421 is an equidigital number, since it uses as much as digits as its factorization.

27976333421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 47.

The spelling of 27976333421 in words is "twenty-seven billion, nine hundred seventy-six million, three hundred thirty-three thousand, four hundred twenty-one".