616949943 has 4 divisors (see below), whose sum is σ = 822599928. Its totient is φ = 411299960.

The previous prime is 616949923. The next prime is 616949981. The reversal of 616949943 is 349949616.

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 616949943 - 2¹⁰ = 616948919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616949923) 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, 102824988 + ... + 102824993.

It is an arithmetic number, because the mean of its divisors is an integer number (205649982).

Almost surely, 2^616949943 is an apocalyptic number.

616949943 is a deficient number, since it is larger than the sum of its proper divisors (205649985).

616949943 is a wasteful number, since it uses less digits than its factorization.

616949943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205649984.

The product of its digits is 1259712, while the sum is 51.

The square root of 616949943 is about 24838.4770668413. The cubic root of 616949943 is about 851.3013252620.

The spelling of 616949943 in words is "six hundred sixteen million, nine hundred forty-nine thousand, nine hundred forty-three".