421970813 has 8 divisors (see below), whose sum is σ = 460524960. Its totient is φ = 383448880.

The previous prime is 421970807. The next prime is 421970827. The reversal of 421970813 is 318079124.

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

It is a cyclic number.

It is not a de Polignac number, because 421970813 - 2¹⁶ = 421905277 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 (421970833) 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, 25406 + ... + 38592.

It is an arithmetic number, because the mean of its divisors is an integer number (57565620).

Almost surely, 2^421970813 is an apocalyptic number.

It is an amenable number.

421970813 is a deficient number, since it is larger than the sum of its proper divisors (38554147).

421970813 is a wasteful number, since it uses less digits than its factorization.

421970813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16107.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 421970813 is about 20541.9281714254. The cubic root of 421970813 is about 750.0567737763.

The spelling of 421970813 in words is "four hundred twenty-one million, nine hundred seventy thousand, eight hundred thirteen".