800079429421 has 2 divisors, whose sum is σ = 800079429422. Its totient is φ = 800079429420.

The previous prime is 800079429379. The next prime is 800079429449. The reversal of 800079429421 is 124924970008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 735801968521 + 64277460900 = 857789^2 + 253530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800079429421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800079429451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400039714710 + 400039714711.

It is an arithmetic number, because the mean of its divisors is an integer number (400039714711).

Almost surely, 2^800079429421 is an apocalyptic number.

It is an amenable number.

800079429421 is a deficient number, since it is larger than the sum of its proper divisors (1).

800079429421 is an equidigital number, since it uses as much as digits as its factorization.

800079429421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 800079429421 in words is "eight hundred billion, seventy-nine million, four hundred twenty-nine thousand, four hundred twenty-one".