3109785157 has 8 divisors (see below), whose sum is σ = 3328941600. Its totient is φ = 2896177104.

The previous prime is 3109785137. The next prime is 3109785209. The reversal of 3109785157 is 7515879013.

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 3109785157 - 2²³ = 3101396549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3109785137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385938 + ... + 1388179.

It is an arithmetic number, because the mean of its divisors is an integer number (416117700).

Almost surely, 2^3109785157 is an apocalyptic number.

It is an amenable number.

3109785157 is a deficient number, since it is larger than the sum of its proper divisors (219156443).

3109785157 is a wasteful number, since it uses less digits than its factorization.

3109785157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774195.

The product of its (nonzero) digits is 264600, while the sum is 46.

The square root of 3109785157 is about 55765.4476983732. The cubic root of 3109785157 is about 1459.6322894892.

The spelling of 3109785157 in words is "three billion, one hundred nine million, seven hundred eighty-five thousand, one hundred fifty-seven".