613673978 has 8 divisors (see below), whose sum is σ = 942962580. Its totient is φ = 299353120.

The previous prime is 613673953. The next prime is 613673981. The reversal of 613673978 is 879376316.

It can be written as a sum of positive squares in 2 ways, for example, as 532547929 + 81126049 = 23077^2 + 9007^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3741833 + ... + 3741996.

Almost surely, 2^613673978 is an apocalyptic number.

613673978 is a deficient number, since it is larger than the sum of its proper divisors (329288602).

613673978 is a wasteful number, since it uses less digits than its factorization.

613673978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7483872.

The product of its digits is 1143072, while the sum is 50.

The square root of 613673978 is about 24772.4439246514. The cubic root of 613673978 is about 849.7918650716.

The spelling of 613673978 in words is "six hundred thirteen million, six hundred seventy-three thousand, nine hundred seventy-eight".