421312117 has 2 divisors, whose sum is σ = 421312118. Its totient is φ = 421312116.

The previous prime is 421312093. The next prime is 421312153. The reversal of 421312117 is 711213124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411237841 + 10074276 = 20279^2 + 3174^2 .

It is a cyclic number.

It is not a de Polignac number, because 421312117 - 2²³ = 412923509 is a prime.

It is a Chen prime.

It is equal to p_22410580 and since 421312117 and 22410580 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421312217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210656058 + 210656059.

It is an arithmetic number, because the mean of its divisors is an integer number (210656059).

Almost surely, 2^421312117 is an apocalyptic number.

It is an amenable number.

421312117 is a deficient number, since it is larger than the sum of its proper divisors (1).

421312117 is an equidigital number, since it uses as much as digits as its factorization.

421312117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 421312117 is about 20525.8889454269. Note that the first 3 decimals coincide. The cubic root of 421312117 is about 749.6662912437. Note that the first 3 decimals are identical.

The spelling of 421312117 in words is "four hundred twenty-one million, three hundred twelve thousand, one hundred seventeen".