421006893 has 4 divisors (see below), whose sum is σ = 561342528. Its totient is φ = 280671260.

The previous prime is 421006889. The next prime is 421006907. The reversal of 421006893 is 398600124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421006893 - 2² = 421006889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421406893) 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, 70167813 + ... + 70167818.

It is an arithmetic number, because the mean of its divisors is an integer number (140335632).

Almost surely, 2^421006893 is an apocalyptic number.

It is an amenable number.

421006893 is a deficient number, since it is larger than the sum of its proper divisors (140335635).

421006893 is a wasteful number, since it uses less digits than its factorization.

421006893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140335634.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 421006893 is about 20518.4525001278. The cubic root of 421006893 is about 749.4852129621.

The spelling of 421006893 in words is "four hundred twenty-one million, six thousand, eight hundred ninety-three".