421959644 has 6 divisors (see below), whose sum is σ = 738429384. Its totient is φ = 210979820.

The previous prime is 421959641. The next prime is 421959647. The reversal of 421959644 is 446959124.

It is an interprime number because it is at equal distance from previous prime (421959641) and next prime (421959647).

It is a junction number, because it is equal to n+sod(n) for n = 421959595 and 421959604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421959641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52744952 + ... + 52744959.

It is an arithmetic number, because the mean of its divisors is an integer number (123071564).

Almost surely, 2^421959644 is an apocalyptic number.

It is an amenable number.

421959644 is a deficient number, since it is larger than the sum of its proper divisors (316469740).

421959644 is a wasteful number, since it uses less digits than its factorization.

421959644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105489915 (or 105489913 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 421959644 is about 20541.6563110183. The cubic root of 421959644 is about 750.0501560532.

The spelling of 421959644 in words is "four hundred twenty-one million, nine hundred fifty-nine thousand, six hundred forty-four".