421694188 has 6 divisors (see below), whose sum is σ = 737964836. Its totient is φ = 210847092.

The previous prime is 421694137. The next prime is 421694201. The reversal of 421694188 is 881496124.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52711770 + ... + 52711777.

Almost surely, 2^421694188 is an apocalyptic number.

It is an amenable number.

421694188 is a deficient number, since it is larger than the sum of its proper divisors (316270648).

421694188 is a wasteful number, since it uses less digits than its factorization.

421694188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105423551 (or 105423549 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 421694188 is about 20535.1938875678. The cubic root of 421694188 is about 749.8928368370.

The spelling of 421694188 in words is "four hundred twenty-one million, six hundred ninety-four thousand, one hundred eighty-eight".