421964933693 has 2 divisors, whose sum is σ = 421964933694. Its totient is φ = 421964933692.

The previous prime is 421964933653. The next prime is 421964933701. The reversal of 421964933693 is 396339469124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370799398489 + 51165535204 = 608933^2 + 226198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421964933693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421964933653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210982466846 + 210982466847.

It is an arithmetic number, because the mean of its divisors is an integer number (210982466847).

Almost surely, 2^421964933693 is an apocalyptic number.

It is an amenable number.

421964933693 is a deficient number, since it is larger than the sum of its proper divisors (1).

421964933693 is an equidigital number, since it uses as much as digits as its factorization.

421964933693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22674816, while the sum is 59.

The spelling of 421964933693 in words is "four hundred twenty-one billion, nine hundred sixty-four million, nine hundred thirty-three thousand, six hundred ninety-three".