426399449 has 4 divisors (see below), whose sum is σ = 487313664. Its totient is φ = 365485236.

The previous prime is 426399443. The next prime is 426399473. The reversal of 426399449 is 944993624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426399449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 426399397 and 426399406.

It is not an unprimeable number, because it can be changed into a prime (426399443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30457097 + ... + 30457110.

It is an arithmetic number, because the mean of its divisors is an integer number (121828416).

Almost surely, 2^426399449 is an apocalyptic number.

It is an amenable number.

426399449 is a deficient number, since it is larger than the sum of its proper divisors (60914215).

426399449 is an equidigital number, since it uses as much as digits as its factorization.

426399449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60914214.

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

The square root of 426399449 is about 20649.4418568638. The cubic root of 426399449 is about 752.6716268759.

The spelling of 426399449 in words is "four hundred twenty-six million, three hundred ninety-nine thousand, four hundred forty-nine".