422128831493 has 2 divisors, whose sum is σ = 422128831494. Its totient is φ = 422128831492.

The previous prime is 422128831489. The next prime is 422128831517. The reversal of 422128831493 is 394138821224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309811352449 + 112317479044 = 556607^2 + 335138^2 .

It is a cyclic number.

It is not a de Polignac number, because 422128831493 - 2² = 422128831489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422128831403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211064415746 + 211064415747.

It is an arithmetic number, because the mean of its divisors is an integer number (211064415747).

Almost surely, 2^422128831493 is an apocalyptic number.

It is an amenable number.

422128831493 is a deficient number, since it is larger than the sum of its proper divisors (1).

422128831493 is an equidigital number, since it uses as much as digits as its factorization.

422128831493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 47.

The spelling of 422128831493 in words is "four hundred twenty-two billion, one hundred twenty-eight million, eight hundred thirty-one thousand, four hundred ninety-three".