3969149 has 4 divisors (see below), whose sum is σ = 3991260. Its totient is φ = 3947040.

The previous prime is 3969137. The next prime is 3969151. The reversal of 3969149 is 9419693.

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 2059225 + 1909924 = 1435^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 3969149 - 2⁸ = 3968893 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 (3969349) 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, 10784 + ... + 11145.

It is an arithmetic number, because the mean of its divisors is an integer number (997815).

Almost surely, 2^3969149 is an apocalyptic number.

It is an amenable number.

3969149 is a deficient number, since it is larger than the sum of its proper divisors (22111).

3969149 is a wasteful number, since it uses less digits than its factorization.

3969149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22110.

The product of its digits is 52488, while the sum is 41.

The square root of 3969149 is about 1992.2723207433. The cubic root of 3969149 is about 158.3309438851.

The spelling of 3969149 in words is "three million, nine hundred sixty-nine thousand, one hundred forty-nine".