27934064621 has 2 divisors, whose sum is σ = 27934064622. Its totient is φ = 27934064620.

The previous prime is 27934064563. The next prime is 27934064659. The reversal of 27934064621 is 12646043972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27031963396 + 902101225 = 164414^2 + 30035^2 .

It is a cyclic number.

It is not a de Polignac number, because 27934064621 - 2²⁶ = 27866955757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27934064021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13967032310 + 13967032311.

It is an arithmetic number, because the mean of its divisors is an integer number (13967032311).

Almost surely, 2^27934064621 is an apocalyptic number.

It is an amenable number.

27934064621 is a deficient number, since it is larger than the sum of its proper divisors (1).

27934064621 is an equidigital number, since it uses as much as digits as its factorization.

27934064621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 27934064621 in words is "twenty-seven billion, nine hundred thirty-four million, sixty-four thousand, six hundred twenty-one".