3690391 has 4 divisors (see below), whose sum is σ = 3753000. Its totient is φ = 3627784.

The previous prime is 3690371. The next prime is 3690397. The reversal of 3690391 is 1930963.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3690391 - 2¹¹ = 3688343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3690397) 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 3 ways as a sum of consecutive naturals, for example, 31216 + ... + 31333.

It is an arithmetic number, because the mean of its divisors is an integer number (938250).

Almost surely, 2^3690391 is an apocalyptic number.

3690391 is a deficient number, since it is larger than the sum of its proper divisors (62609).

3690391 is an equidigital number, since it uses as much as digits as its factorization.

3690391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62608.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 3690391 is about 1921.0390417688. The cubic root of 3690391 is about 154.5340289446.

The spelling of 3690391 in words is "three million, six hundred ninety thousand, three hundred ninety-one".