421883687 has 4 divisors (see below), whose sum is σ = 440226480. Its totient is φ = 403540896.

The previous prime is 421883659. The next prime is 421883699. The reversal of 421883687 is 786388124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421883687 - 2¹⁶ = 421818151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421883617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9171362 + ... + 9171407.

It is an arithmetic number, because the mean of its divisors is an integer number (110056620).

Almost surely, 2^421883687 is an apocalyptic number.

421883687 is a deficient number, since it is larger than the sum of its proper divisors (18342793).

421883687 is a wasteful number, since it uses less digits than its factorization.

421883687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18342792.

The product of its digits is 516096, while the sum is 47.

The square root of 421883687 is about 20539.8073749488. The cubic root of 421883687 is about 750.0051478165.

The spelling of 421883687 in words is "four hundred twenty-one million, eight hundred eighty-three thousand, six hundred eighty-seven".