421646411 has 2 divisors, whose sum is σ = 421646412. Its totient is φ = 421646410.

The previous prime is 421646383. The next prime is 421646437. The reversal of 421646411 is 114646124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421646411 - 2¹⁸ = 421384267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421646711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210823205 + 210823206.

It is an arithmetic number, because the mean of its divisors is an integer number (210823206).

Almost surely, 2^421646411 is an apocalyptic number.

421646411 is a deficient number, since it is larger than the sum of its proper divisors (1).

421646411 is an equidigital number, since it uses as much as digits as its factorization.

421646411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

The square root of 421646411 is about 20534.0305590500. The cubic root of 421646411 is about 749.8645153785.

The spelling of 421646411 in words is "four hundred twenty-one million, six hundred forty-six thousand, four hundred eleven".