420664233 has 16 divisors (see below), whose sum is σ = 623422656. Its totient is φ = 250136640.

The previous prime is 420664229. The next prime is 420664249. The reversal of 420664233 is 332466024.

It is a happy number.

It is not a de Polignac number, because 420664233 - 2² = 420664229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420664233.

It is not an unprimeable number, because it can be changed into a prime (420664213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118510 + ... + 122007.

It is an arithmetic number, because the mean of its divisors is an integer number (38963916).

Almost surely, 2^420664233 is an apocalyptic number.

It is an amenable number.

420664233 is a deficient number, since it is larger than the sum of its proper divisors (202758423).

420664233 is a wasteful number, since it uses less digits than its factorization.

420664233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240584.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 420664233 is about 20510.1007554814. The cubic root of 420664233 is about 749.2818209558.

The spelling of 420664233 in words is "four hundred twenty million, six hundred sixty-four thousand, two hundred thirty-three".