673978113 has 6 divisors (see below), whose sum is σ = 973523954. Its totient is φ = 449318736.

The previous prime is 673978111. The next prime is 673978117. The reversal of 673978113 is 311879376.

It can be written as a sum of positive squares in only one way, i.e., 673558209 + 419904 = 25953^2 + 648^2 .

It is not a de Polignac number, because 673978113 - 2¹ = 673978111 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (673978111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37443220 + ... + 37443237.

Almost surely, 2^673978113 is an apocalyptic number.

It is an amenable number.

673978113 is a deficient number, since it is larger than the sum of its proper divisors (299545841).

673978113 is a wasteful number, since it uses less digits than its factorization.

673978113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74886463 (or 74886460 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 673978113 is about 25961.0884402022. The cubic root of 673978113 is about 876.7624288945.

The spelling of 673978113 in words is "six hundred seventy-three million, nine hundred seventy-eight thousand, one hundred thirteen".