426443999 has 8 divisors (see below), whose sum is σ = 453248640. Its totient is φ = 400075416.

The previous prime is 426443959. The next prime is 426444001. The reversal of 426443999 is 999344624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426443999 is a prime.

It is a super-2 number, since 2×426443999² = 363708968566224002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426443909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106997 + ... + 110910.

It is an arithmetic number, because the mean of its divisors is an integer number (56656080).

Almost surely, 2^426443999 is an apocalyptic number.

426443999 is a deficient number, since it is larger than the sum of its proper divisors (26804641).

426443999 is a wasteful number, since it uses less digits than its factorization.

426443999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218029.

The product of its digits is 1679616, while the sum is 50.

The square root of 426443999 is about 20650.5205503396. The cubic root of 426443999 is about 752.6978388808.

The spelling of 426443999 in words is "four hundred twenty-six million, four hundred forty-three thousand, nine hundred ninety-nine".