3969155 has 8 divisors (see below), whose sum is σ = 4784832. Its totient is φ = 3160768.

The previous prime is 3969151. The next prime is 3969167. The reversal of 3969155 is 5519693.

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 3969155 - 2² = 3969151 is a prime.

It is a Duffinian number.

3969155 is a Rhonda number in base 10.

Its product of digits (36450) is a multiple of the sum of its prime divisors (3645).

It is not an unprimeable number, because it can be changed into a prime (3969151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539 + ... + 2868.

It is an arithmetic number, because the mean of its divisors is an integer number (598104).

Almost surely, 2^3969155 is an apocalyptic number.

3969155 is a deficient number, since it is larger than the sum of its proper divisors (815677).

3969155 is a wasteful number, since it uses less digits than its factorization.

3969155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645.

The product of its digits is 36450, while the sum is 38.

The square root of 3969155 is about 1992.2738265610. The cubic root of 3969155 is about 158.3310236659.

It can be divided in two parts, 39691 and 55, that multiplied together give a triangular number (2183005 = T₂₀₈₉).

The spelling of 3969155 in words is "three million, nine hundred sixty-nine thousand, one hundred fifty-five".