479439146188621 has 2 divisors, whose sum is σ = 479439146188622. Its totient is φ = 479439146188620.

The previous prime is 479439146188619. The next prime is 479439146188799. The reversal of 479439146188621 is 126881641934974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 466563888008100 + 12875258180521 = 21600090^2 + 3588211^2 .

It is a cyclic number.

It is not a de Polignac number, because 479439146188621 - 2¹ = 479439146188619 is a prime.

Together with 479439146188619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479439146188421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239719573094310 + 239719573094311.

It is an arithmetic number, because the mean of its divisors is an integer number (239719573094311).

Almost surely, 2^{479439146188621} is an apocalyptic number.

It is an amenable number.

479439146188621 is a deficient number, since it is larger than the sum of its proper divisors (1).

479439146188621 is an equidigital number, since it uses as much as digits as its factorization.

479439146188621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 501645312, while the sum is 73.

The spelling of 479439146188621 in words is "four hundred seventy-nine trillion, four hundred thirty-nine billion, one hundred forty-six million, one hundred eighty-eight thousand, six hundred twenty-one".