3109400643 has 8 divisors (see below), whose sum is σ = 4146164928. Its totient is φ = 2072785064.

The previous prime is 3109400639. The next prime is 3109400653. The reversal of 3109400643 is 3460049013.

It is a Cunningham number, because it is equal to 55762²-1.

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 3109400643 - 2² = 3109400639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3109400643.

It is not an unprimeable number, because it can be changed into a prime (3109400653) 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, 27880 + ... + 83642.

It is an arithmetic number, because the mean of its divisors is an integer number (518270616).

Almost surely, 2^3109400643 is an apocalyptic number.

3109400643 is a deficient number, since it is larger than the sum of its proper divisors (1036764285).

3109400643 is a wasteful number, since it uses less digits than its factorization.

3109400643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74353.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 3109400643 is about 55761.9999910333. Note that the first 5 decimals coincide. The cubic root of 3109400643 is about 1459.5721275428.

Adding to 3109400643 its reverse (3460049013), we get a palindrome (6569449656).

The spelling of 3109400643 in words is "three billion, one hundred nine million, four hundred thousand, six hundred forty-three".