425749391 has 2 divisors, whose sum is σ = 425749392. Its totient is φ = 425749390.

The previous prime is 425749351. The next prime is 425749403. The reversal of 425749391 is 193947524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425749391 - 2¹⁸ = 425487247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425749351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212874695 + 212874696.

It is an arithmetic number, because the mean of its divisors is an integer number (212874696).

Almost surely, 2^425749391 is an apocalyptic number.

425749391 is a deficient number, since it is larger than the sum of its proper divisors (1).

425749391 is an equidigital number, since it uses as much as digits as its factorization.

425749391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 425749391 is about 20633.6955245540. The cubic root of 425749391 is about 752.2889426230.

The spelling of 425749391 in words is "four hundred twenty-five million, seven hundred forty-nine thousand, three hundred ninety-one".