420621093 has 24 divisors (see below), whose sum is σ = 631027488. Its totient is φ = 279986544.

The previous prime is 420621083. The next prime is 420621101. The reversal of 420621093 is 390126024.

It is not a de Polignac number, because 420621093 - 2⁴ = 420621077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420621073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294046 + ... + 295472.

It is an arithmetic number, because the mean of its divisors is an integer number (26292812).

Almost surely, 2^420621093 is an apocalyptic number.

It is an amenable number.

420621093 is a deficient number, since it is larger than the sum of its proper divisors (210406395).

420621093 is a wasteful number, since it uses less digits than its factorization.

420621093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655 (or 2643 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 420621093 is about 20509.0490515772. The cubic root of 420621093 is about 749.2562066057.

The spelling of 420621093 in words is "four hundred twenty million, six hundred twenty-one thousand, ninety-three".