421334489 has 2 divisors, whose sum is σ = 421334490. Its totient is φ = 421334488.

The previous prime is 421334483. The next prime is 421334497. The reversal of 421334489 is 984433124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397324489 + 24010000 = 19933^2 + 4900^2 .

It is a cyclic number.

It is not a de Polignac number, because 421334489 - 2⁸ = 421334233 is a prime.

It is a super-2 number, since 2×421334489² = 355045503241782242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421334483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210667244 + 210667245.

It is an arithmetic number, because the mean of its divisors is an integer number (210667245).

Almost surely, 2^421334489 is an apocalyptic number.

It is an amenable number.

421334489 is a deficient number, since it is larger than the sum of its proper divisors (1).

421334489 is an equidigital number, since it uses as much as digits as its factorization.

421334489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 38.

The square root of 421334489 is about 20526.4339084995. The cubic root of 421334489 is about 749.6795602959.

The spelling of 421334489 in words is "four hundred twenty-one million, three hundred thirty-four thousand, four hundred eighty-nine".