613739986 has 4 divisors (see below), whose sum is σ = 920609982. Its totient is φ = 306869992.

The previous prime is 613739983. The next prime is 613739993. The reversal of 613739986 is 689937316.

613739986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 608362225 + 5377761 = 24665^2 + 2319^2 .

It is not an unprimeable number, because it can be changed into a prime (613739983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153434995 + ... + 153434998.

Almost surely, 2^613739986 is an apocalyptic number.

613739986 is a deficient number, since it is larger than the sum of its proper divisors (306869996).

613739986 is a wasteful number, since it uses less digits than its factorization.

613739986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306869995.

The product of its digits is 1469664, while the sum is 52.

The square root of 613739986 is about 24773.7761756257. The cubic root of 613739986 is about 849.8223324166.

The spelling of 613739986 in words is "six hundred thirteen million, seven hundred thirty-nine thousand, nine hundred eighty-six".