3969511 has 16 divisors (see below), whose sum is σ = 4932928. Its totient is φ = 3110400.

The previous prime is 3969503. The next prime is 3969527. The reversal of 3969511 is 1159693.

It is a 9-Lehmer number, since φ(3969511) divides (3969511-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 3969511 - 2³ = 3969503 is a prime.

3969511 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16351 + ... + 16591.

It is an arithmetic number, because the mean of its divisors is an integer number (308308).

Almost surely, 2^3969511 is an apocalyptic number.

3969511 is a deficient number, since it is larger than the sum of its proper divisors (963417).

3969511 is a wasteful number, since it uses less digits than its factorization.

3969511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its digits is 7290, while the sum is 34.

The square root of 3969511 is about 1992.3631697058. The cubic root of 3969511 is about 158.3357571805.

It can be divided in two parts, 39695 and 11, that multiplied together give a triangular number (436645 = T₉₃₄).

The spelling of 3969511 in words is "three million, nine hundred sixty-nine thousand, five hundred eleven".