3160128949 has 4 divisors (see below), whose sum is σ = 3161688460. Its totient is φ = 3158569440.

The previous prime is 3160128943. The next prime is 3160128977. The reversal of 3160128949 is 9498210613.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3082248324 + 77880625 = 55518^2 + 8825^2 .

It is a cyclic number.

It is not a de Polignac number, because 3160128949 - 2³ = 3160128941 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 (3160128941) 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, 776712 + ... + 780769.

It is an arithmetic number, because the mean of its divisors is an integer number (790422115).

Almost surely, 2^3160128949 is an apocalyptic number.

It is an amenable number.

3160128949 is a deficient number, since it is larger than the sum of its proper divisors (1559511).

3160128949 is a wasteful number, since it uses less digits than its factorization.

3160128949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559510.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 3160128949 is about 56215.0242284036. The cubic root of 3160128949 is about 1467.4667445040.

The spelling of 3160128949 in words is "three billion, one hundred sixty million, one hundred twenty-eight thousand, nine hundred forty-nine".