3117387949 has 4 divisors (see below), whose sum is σ = 3357187036. Its totient is φ = 2877588864.

The previous prime is 3117387947. The next prime is 3117387979. The reversal of 3117387949 is 9497837113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9497837113 = 127 ⋅74786119.

It can be written as a sum of positive squares in 2 ways, for example, as 724417225 + 2392970724 = 26915^2 + 48918^2 .

It is a cyclic number.

It is not a de Polignac number, because 3117387949 - 2¹ = 3117387947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3117387896 and 3117387905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3117387947) 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, 119899524 + ... + 119899549.

It is an arithmetic number, because the mean of its divisors is an integer number (839296759).

Almost surely, 2^3117387949 is an apocalyptic number.

It is an amenable number.

3117387949 is a deficient number, since it is larger than the sum of its proper divisors (239799087).

3117387949 is a wasteful number, since it uses less digits than its factorization.

3117387949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239799086.

The product of its digits is 1143072, while the sum is 52.

The square root of 3117387949 is about 55833.5736721195. The cubic root of 3117387949 is about 1460.8208227657.

The spelling of 3117387949 in words is "three billion, one hundred seventeen million, three hundred eighty-seven thousand, nine hundred forty-nine".