3691965 has 8 divisors (see below), whose sum is σ = 5907168. Its totient is φ = 1969040.

The previous prime is 3691957. The next prime is 3692021. The reversal of 3691965 is 5691963.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3691965 - 2³ = 3691957 is a prime.

It is a super-2 number, since 2×3691965² = 27261211122450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 123051 + ... + 123080.

It is an arithmetic number, because the mean of its divisors is an integer number (738396).

Almost surely, 2^3691965 is an apocalyptic number.

It is an amenable number.

3691965 is a deficient number, since it is larger than the sum of its proper divisors (2215203).

3691965 is a wasteful number, since it uses less digits than its factorization.

3691965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246139.

The product of its digits is 43740, while the sum is 39.

The square root of 3691965 is about 1921.4486722262. The cubic root of 3691965 is about 154.5559960829. Note that the first 3 decimals are identical.

It can be divided in two parts, 3691 and 965, that added together give a triangular number (4656 = T₉₆).

The spelling of 3691965 in words is "three million, six hundred ninety-one thousand, nine hundred sixty-five".