421643299 has 16 divisors (see below), whose sum is σ = 556609536. Its totient is φ = 309225600.

The previous prime is 421643297. The next prime is 421643309. The reversal of 421643299 is 992346124.

It is a cyclic number.

It is not a de Polignac number, because 421643299 - 2¹ = 421643297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421643297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159747 + ... + 162364.

It is an arithmetic number, because the mean of its divisors is an integer number (34788096).

Almost surely, 2^421643299 is an apocalyptic number.

421643299 is a deficient number, since it is larger than the sum of its proper divisors (134966237).

421643299 is a wasteful number, since it uses less digits than its factorization.

421643299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322146.

The product of its digits is 93312, while the sum is 40.

The square root of 421643299 is about 20533.9547822625. The cubic root of 421643299 is about 749.8626705594.

The spelling of 421643299 in words is "four hundred twenty-one million, six hundred forty-three thousand, two hundred ninety-nine".