675638999 has 20 divisors (see below), whose sum is σ = 791226480. Its totient is φ = 576898560.

The previous prime is 675638969. The next prime is 675639037. The reversal of 675638999 is 999836576.

It is not a de Polignac number, because 675638999 - 2²⁴ = 658861783 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 (675638969) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1053719 + ... + 1054359.

It is an arithmetic number, because the mean of its divisors is an integer number (39561324).

Almost surely, 2^675638999 is an apocalyptic number.

675638999 is a deficient number, since it is larger than the sum of its proper divisors (115587481).

675638999 is an frugal number, since it uses more digits than its factorization.

675638999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1087 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 62.

The square root of 675638999 is about 25993.0567459851. The cubic root of 675638999 is about 877.4820407414.

The spelling of 675638999 in words is "six hundred seventy-five million, six hundred thirty-eight thousand, nine hundred ninety-nine".