673998999 has 8 divisors (see below), whose sum is σ = 910976112. Its totient is φ = 443177280.

The previous prime is 673998979. The next prime is 673999003. The reversal of 673998999 is 999899376.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 673998999 - 2²³ = 665610391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673998979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1538592 + ... + 1539029.

It is an arithmetic number, because the mean of its divisors is an integer number (113872014).

Almost surely, 2^673998999 is an apocalyptic number.

673998999 is a deficient number, since it is larger than the sum of its proper divisors (236977113).

673998999 is a wasteful number, since it uses less digits than its factorization.

673998999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077697.

The product of its digits is 59521392, while the sum is 69.

The square root of 673998999 is about 25961.4906929475. The cubic root of 673998999 is about 876.7714855046.

The spelling of 673998999 in words is "six hundred seventy-three million, nine hundred ninety-eight thousand, nine hundred ninety-nine".