673645994 has 8 divisors (see below), whose sum is σ = 1154821728. Its totient is φ = 288705420.

The previous prime is 673645991. The next prime is 673646033. The reversal of 673645994 is 499546376.

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

It is not an unprimeable number, because it can be changed into a prime (673645991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24058772 + ... + 24058799.

It is an arithmetic number, because the mean of its divisors is an integer number (144352716).

Almost surely, 2^673645994 is an apocalyptic number.

673645994 is a deficient number, since it is larger than the sum of its proper divisors (481175734).

673645994 is a wasteful number, since it uses less digits than its factorization.

673645994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48117580.

The product of its digits is 4898880, while the sum is 53.

The square root of 673645994 is about 25954.6911751999. The cubic root of 673645994 is about 876.6183899419.

The spelling of 673645994 in words is "six hundred seventy-three million, six hundred forty-five thousand, nine hundred ninety-four".