3695991 has 16 divisors (see below), whose sum is σ = 5367264. Its totient is φ = 2248704.

The previous prime is 3695983. The next prime is 3696001. The reversal of 3695991 is 1995963.

It is not a de Polignac number, because 3695991 - 2³ = 3695983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3695911) 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, 3295 + ... + 4271.

It is an arithmetic number, because the mean of its divisors is an integer number (335454).

Almost surely, 2^3695991 is an apocalyptic number.

3695991 is a deficient number, since it is larger than the sum of its proper divisors (1671273).

3695991 is a wasteful number, since it uses less digits than its factorization.

3695991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090.

The product of its digits is 65610, while the sum is 42.

The square root of 3695991 is about 1922.4960338061. The cubic root of 3695991 is about 154.6121555532.

The spelling of 3695991 in words is "three million, six hundred ninety-five thousand, nine hundred ninety-one".