3657091 has 4 divisors (see below), whose sum is σ = 3872232. Its totient is φ = 3441952.

The previous prime is 3657089. The next prime is 3657097. The reversal of 3657091 is 1907563.

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 3657091 - 2¹ = 3657089 is a prime.

It is a Duffinian number.

3657091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3657097) 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, 107545 + ... + 107578.

It is an arithmetic number, because the mean of its divisors is an integer number (968058).

Almost surely, 2^3657091 is an apocalyptic number.

3657091 is a deficient number, since it is larger than the sum of its proper divisors (215141).

3657091 is a wasteful number, since it uses less digits than its factorization.

3657091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215140.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 3657091 is about 1912.3522165124. The cubic root of 3657091 is about 154.0678146263.

The spelling of 3657091 in words is "three million, six hundred fifty-seven thousand, ninety-one".