421139713 has 2 divisors, whose sum is σ = 421139714. Its totient is φ = 421139712.

The previous prime is 421139651. The next prime is 421139767. The reversal of 421139713 is 317931124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339001744 + 82137969 = 18412^2 + 9063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421139713 is a prime.

It is not a weakly prime, because it can be changed into another prime (421139773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210569856 + 210569857.

It is an arithmetic number, because the mean of its divisors is an integer number (210569857).

Almost surely, 2^421139713 is an apocalyptic number.

It is an amenable number.

421139713 is a deficient number, since it is larger than the sum of its proper divisors (1).

421139713 is an equidigital number, since it uses as much as digits as its factorization.

421139713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 421139713 is about 20521.6888437575. The cubic root of 421139713 is about 749.5640209825.

The spelling of 421139713 in words is "four hundred twenty-one million, one hundred thirty-nine thousand, seven hundred thirteen".