421866977 has 8 divisors (see below), whose sum is σ = 485654016. Its totient is φ = 358960032.

The previous prime is 421866947. The next prime is 421866997. The reversal of 421866977 is 779668124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421866977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421866947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218993 + ... + 220910.

It is an arithmetic number, because the mean of its divisors is an integer number (60706752).

Almost surely, 2^421866977 is an apocalyptic number.

It is an amenable number.

421866977 is a deficient number, since it is larger than the sum of its proper divisors (63787039).

421866977 is a wasteful number, since it uses less digits than its factorization.

421866977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440047.

The product of its digits is 1016064, while the sum is 50.

The square root of 421866977 is about 20539.4005998228. The cubic root of 421866977 is about 749.9952455995.

The spelling of 421866977 in words is "four hundred twenty-one million, eight hundred sixty-six thousand, nine hundred seventy-seven".