421899341 has 2 divisors, whose sum is σ = 421899342. Its totient is φ = 421899340.

The previous prime is 421899329. The next prime is 421899347. The reversal of 421899341 is 143998124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248976841 + 172922500 = 15779^2 + 13150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421899341 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421899347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210949670 + 210949671.

It is an arithmetic number, because the mean of its divisors is an integer number (210949671).

Almost surely, 2^421899341 is an apocalyptic number.

It is an amenable number.

421899341 is a deficient number, since it is larger than the sum of its proper divisors (1).

421899341 is an equidigital number, since it uses as much as digits as its factorization.

421899341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 421899341 is about 20540.1884363313. The cubic root of 421899341 is about 750.0144240189.

The spelling of 421899341 in words is "four hundred twenty-one million, eight hundred ninety-nine thousand, three hundred forty-one".