3969129 has 4 divisors (see below), whose sum is σ = 5292176. Its totient is φ = 2646084.

The previous prime is 3969071. The next prime is 3969137. The reversal of 3969129 is 9219693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3969129 - 2⁷ = 3969001 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3969529) 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, 661519 + ... + 661524.

It is an arithmetic number, because the mean of its divisors is an integer number (1323044).

Almost surely, 2^3969129 is an apocalyptic number.

It is an amenable number.

3969129 is a deficient number, since it is larger than the sum of its proper divisors (1323047).

3969129 is a wasteful number, since it uses less digits than its factorization.

3969129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323046.

The product of its digits is 26244, while the sum is 39.

The square root of 3969129 is about 1992.2673013429. The cubic root of 3969129 is about 158.3306779487.

The spelling of 3969129 in words is "three million, nine hundred sixty-nine thousand, one hundred twenty-nine".