421759807 has 6 divisors (see below), whose sum is σ = 490618608. Its totient is φ = 361508364.

The previous prime is 421759801. The next prime is 421759883. The reversal of 421759807 is 708957124.

It is not a de Polignac number, because 421759807 - 2³ = 421759799 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 (421759801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4303623 + ... + 4303720.

It is an arithmetic number, because the mean of its divisors is an integer number (81769768).

Almost surely, 2^421759807 is an apocalyptic number.

421759807 is a deficient number, since it is larger than the sum of its proper divisors (68858801).

421759807 is an equidigital number, since it uses as much as digits as its factorization.

421759807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8607357 (or 8607350 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 421759807 is about 20536.7915459061. The cubic root of 421759807 is about 749.9317312675.

The spelling of 421759807 in words is "four hundred twenty-one million, seven hundred fifty-nine thousand, eight hundred seven".