421331117 has 2 divisors, whose sum is σ = 421331118. Its totient is φ = 421331116.

The previous prime is 421331069. The next prime is 421331153. The reversal of 421331117 is 711133124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358382761 + 62948356 = 18931^2 + 7934^2 .

It is a cyclic number.

It is not a de Polignac number, because 421331117 - 2²⁴ = 404553901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421331092 and 421331101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421331167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210665558 + 210665559.

It is an arithmetic number, because the mean of its divisors is an integer number (210665559).

Almost surely, 2^421331117 is an apocalyptic number.

It is an amenable number.

421331117 is a deficient number, since it is larger than the sum of its proper divisors (1).

421331117 is an equidigital number, since it uses as much as digits as its factorization.

421331117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 421331117 is about 20526.3517703463. The cubic root of 421331117 is about 749.6775603597.

The spelling of 421331117 in words is "four hundred twenty-one million, three hundred thirty-one thousand, one hundred seventeen".