616673639 has 4 divisors (see below), whose sum is σ = 621110280. Its totient is φ = 612237000.

The previous prime is 616673627. The next prime is 616673641. The reversal of 616673639 is 936376616.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 616673639 - 2⁸ = 616673383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616673593 and 616673602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616673609) 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, 2218112 + ... + 2218389.

It is an arithmetic number, because the mean of its divisors is an integer number (155277570).

Almost surely, 2^616673639 is an apocalyptic number.

616673639 is a deficient number, since it is larger than the sum of its proper divisors (4436641).

616673639 is a wasteful number, since it uses less digits than its factorization.

616673639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436640.

The product of its digits is 734832, while the sum is 47.

The square root of 616673639 is about 24832.9144282342. The cubic root of 616673639 is about 851.1742198205.

The spelling of 616673639 in words is "six hundred sixteen million, six hundred seventy-three thousand, six hundred thirty-nine".