613938649 has 8 divisors (see below), whose sum is σ = 628598432. Its totient is φ = 599296320.

The previous prime is 613938641. The next prime is 613938653. The reversal of 613938649 is 946839316.

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

It is a cyclic number.

It is not a de Polignac number, because 613938649 - 2³ = 613938641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613938641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91489 + ... + 97969.

It is an arithmetic number, because the mean of its divisors is an integer number (78574804).

Almost surely, 2^613938649 is an apocalyptic number.

It is an amenable number.

613938649 is a deficient number, since it is larger than the sum of its proper divisors (14659783).

613938649 is a wasteful number, since it uses less digits than its factorization.

613938649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8727.

The product of its digits is 839808, while the sum is 49.

The square root of 613938649 is about 24777.7853933720. The cubic root of 613938649 is about 849.9140162159.

The spelling of 613938649 in words is "six hundred thirteen million, nine hundred thirty-eight thousand, six hundred forty-nine".