426388139 has 4 divisors (see below), whose sum is σ = 448829640. Its totient is φ = 403946640.

The previous prime is 426388121. The next prime is 426388147. The reversal of 426388139 is 931883624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 426388139 - 2⁸ = 426387883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 426388139.

It is not an unprimeable number, because it can be changed into a prime (426388159) 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, 11220722 + ... + 11220759.

It is an arithmetic number, because the mean of its divisors is an integer number (112207410).

Almost surely, 2^426388139 is an apocalyptic number.

426388139 is a deficient number, since it is larger than the sum of its proper divisors (22441501).

426388139 is a wasteful number, since it uses less digits than its factorization.

426388139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22441500.

The product of its digits is 248832, while the sum is 44.

The square root of 426388139 is about 20649.1679977669. The cubic root of 426388139 is about 752.6649720899.

The spelling of 426388139 in words is "four hundred twenty-six million, three hundred eighty-eight thousand, one hundred thirty-nine".