3129649 has 8 divisors (see below), whose sum is σ = 3332448. Its totient is φ = 2928960.

The previous prime is 3129641. The next prime is 3129677. The reversal of 3129649 is 9469213.

3129649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3129649 - 2³ = 3129641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3129641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3454 + ... + 4264.

It is an arithmetic number, because the mean of its divisors is an integer number (416556).

Almost surely, 2^3129649 is an apocalyptic number.

It is an amenable number.

3129649 is a deficient number, since it is larger than the sum of its proper divisors (202799).

3129649 is a wasteful number, since it uses less digits than its factorization.

3129649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055.

The product of its digits is 11664, while the sum is 34.

The square root of 3129649 is about 1769.0814000492. The cubic root of 3129649 is about 146.2733510332.

The spelling of 3129649 in words is "three million, one hundred twenty-nine thousand, six hundred forty-nine".