879368864021 has 2 divisors, whose sum is σ = 879368864022. Its totient is φ = 879368864020.

The previous prime is 879368863969. The next prime is 879368864041. The reversal of 879368864021 is 120468863978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874526095921 + 4842768100 = 935161^2 + 69590^2 .

It is a cyclic number.

It is not a de Polignac number, because 879368864021 - 2¹⁸ = 879368601877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (879368864041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439684432010 + 439684432011.

It is an arithmetic number, because the mean of its divisors is an integer number (439684432011).

Almost surely, 2^879368864021 is an apocalyptic number.

It is an amenable number.

879368864021 is a deficient number, since it is larger than the sum of its proper divisors (1).

879368864021 is an equidigital number, since it uses as much as digits as its factorization.

879368864021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 879368864021 in words is "eight hundred seventy-nine billion, three hundred sixty-eight million, eight hundred sixty-four thousand, twenty-one".