426783431 has 2 divisors, whose sum is σ = 426783432. Its totient is φ = 426783430.

The previous prime is 426783397. The next prime is 426783437. The reversal of 426783431 is 134387624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426783431 is a prime.

It is a super-2 number, since 2×426783431² = 364288193952263522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426783437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213391715 + 213391716.

It is an arithmetic number, because the mean of its divisors is an integer number (213391716).

Almost surely, 2^426783431 is an apocalyptic number.

426783431 is a deficient number, since it is larger than the sum of its proper divisors (1).

426783431 is an equidigital number, since it uses as much as digits as its factorization.

426783431 is an evil number, because the sum of its binary digits is even.

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

The square root of 426783431 is about 20658.7374009159. The cubic root of 426783431 is about 752.8974914940.

The spelling of 426783431 in words is "four hundred twenty-six million, seven hundred eighty-three thousand, four hundred thirty-one".