1634425399 has 16 divisors (see below), whose sum is σ = 1705818400. Its totient is φ = 1565585280.

The previous prime is 1634425393. The next prime is 1634425411. The reversal of 1634425399 is 9935244361.

It is not a de Polignac number, because 1634425399 - 2⁵ = 1634425367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1634425393) 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 15 ways as a sum of consecutive naturals, for example, 4849759 + ... + 4850095.

It is an arithmetic number, because the mean of its divisors is an integer number (106613650).

Almost surely, 2^1634425399 is an apocalyptic number.

1634425399 is a deficient number, since it is larger than the sum of its proper divisors (71393001).

1634425399 is an frugal number, since it uses more digits than its factorization.

1634425399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 441 counting only the distinct ones).

The product of its digits is 699840, while the sum is 46.

The square root of 1634425399 is about 40428.0273943709. The cubic root of 1634425399 is about 1177.9360163006.

The spelling of 1634425399 in words is "one billion, six hundred thirty-four million, four hundred twenty-five thousand, three hundred ninety-nine".