425834639 has 2 divisors, whose sum is σ = 425834640. Its totient is φ = 425834638.

The previous prime is 425834561. The next prime is 425834663. The reversal of 425834639 is 936438524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425834639 - 2¹² = 425830543 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 425834639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425834939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212917319 + 212917320.

It is an arithmetic number, because the mean of its divisors is an integer number (212917320).

Almost surely, 2^425834639 is an apocalyptic number.

425834639 is a deficient number, since it is larger than the sum of its proper divisors (1).

425834639 is an equidigital number, since it uses as much as digits as its factorization.

425834639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 44.

The square root of 425834639 is about 20635.7611684183. The cubic root of 425834639 is about 752.3391496613.

The spelling of 425834639 in words is "four hundred twenty-five million, eight hundred thirty-four thousand, six hundred thirty-nine".