425351639 has 2 divisors, whose sum is σ = 425351640. Its totient is φ = 425351638.

The previous prime is 425351623. The next prime is 425351687. The reversal of 425351639 is 936153524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425351639 - 2⁴ = 425351623 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425351039) 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 as a sum of consecutive naturals, namely, 212675819 + 212675820.

It is an arithmetic number, because the mean of its divisors is an integer number (212675820).

Almost surely, 2^425351639 is an apocalyptic number.

425351639 is a deficient number, since it is larger than the sum of its proper divisors (1).

425351639 is an equidigital number, since it uses as much as digits as its factorization.

425351639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 38.

The square root of 425351639 is about 20624.0548631931. The cubic root of 425351639 is about 752.0545968877.

The spelling of 425351639 in words is "four hundred twenty-five million, three hundred fifty-one thousand, six hundred thirty-nine".