3149891 has 4 divisors (see below), whose sum is σ = 3170112. Its totient is φ = 3129672.

The previous prime is 3149851. The next prime is 3149897. The reversal of 3149891 is 1989413.

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

It is a cyclic number.

It is not a de Polignac number, because 3149891 - 2¹⁰ = 3148867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3149897) 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, 9875 + ... + 10188.

It is an arithmetic number, because the mean of its divisors is an integer number (792528).

Almost surely, 2^3149891 is an apocalyptic number.

3149891 is a deficient number, since it is larger than the sum of its proper divisors (20221).

3149891 is a wasteful number, since it uses less digits than its factorization.

3149891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20220.

The product of its digits is 7776, while the sum is 35.

The square root of 3149891 is about 1774.7932273930. The cubic root of 3149891 is about 146.5880300451.

The spelling of 3149891 in words is "three million, one hundred forty-nine thousand, eight hundred ninety-one".