84274670621 has 2 divisors, whose sum is σ = 84274670622. Its totient is φ = 84274670620.

The previous prime is 84274670617. The next prime is 84274670647. The reversal of 84274670621 is 12607647248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46634402500 + 37640268121 = 215950^2 + 194011^2 .

It is a cyclic number.

It is not a de Polignac number, because 84274670621 - 2² = 84274670617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84274670651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42137335310 + 42137335311.

It is an arithmetic number, because the mean of its divisors is an integer number (42137335311).

Almost surely, 2^84274670621 is an apocalyptic number.

It is an amenable number.

84274670621 is a deficient number, since it is larger than the sum of its proper divisors (1).

84274670621 is an equidigital number, since it uses as much as digits as its factorization.

84274670621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 84274670621 in words is "eighty-four billion, two hundred seventy-four million, six hundred seventy thousand, six hundred twenty-one".