426340279021 has 4 divisors (see below), whose sum is σ = 426688882272. Its totient is φ = 425991675772.

The previous prime is 426340279009. The next prime is 426340279051. The reversal of 426340279021 is 120972043624.

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 not a de Polignac number, because 426340279021 - 2¹⁵ = 426340246253 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426340279051) 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, 174299791 + ... + 174302236.

It is an arithmetic number, because the mean of its divisors is an integer number (106672220568).

Almost surely, 2^426340279021 is an apocalyptic number.

It is an amenable number.

426340279021 is a deficient number, since it is larger than the sum of its proper divisors (348603251).

426340279021 is a wasteful number, since it uses less digits than its factorization.

426340279021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348603250.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 426340279021 in words is "four hundred twenty-six billion, three hundred forty million, two hundred seventy-nine thousand, twenty-one".