426940247 has 4 divisors (see below), whose sum is σ = 430857240. Its totient is φ = 423023256.

The previous prime is 426940229. The next prime is 426940259. The reversal of 426940247 is 742049624.

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 426940247 - 2¹⁶ = 426874711 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 426940247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426942247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958333 + ... + 1958550.

It is an arithmetic number, because the mean of its divisors is an integer number (107714310).

Almost surely, 2^426940247 is an apocalyptic number.

426940247 is a deficient number, since it is larger than the sum of its proper divisors (3916993).

426940247 is a wasteful number, since it uses less digits than its factorization.

426940247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916992.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 426940247 is about 20662.5324440157. The cubic root of 426940247 is about 752.9896943200.

The spelling of 426940247 in words is "four hundred twenty-six million, nine hundred forty thousand, two hundred forty-seven".