3697391 has 4 divisors (see below), whose sum is σ = 3733392. Its totient is φ = 3661392.

The previous prime is 3697363. The next prime is 3697403. The reversal of 3697391 is 1937963.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1937963 = 97 ⋅19979.

It is a cyclic number.

It is not a de Polignac number, because 3697391 - 2¹⁸ = 3435247 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 (3697321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17846 + ... + 18051.

It is an arithmetic number, because the mean of its divisors is an integer number (933348).

Almost surely, 2^3697391 is an apocalyptic number.

3697391 is a deficient number, since it is larger than the sum of its proper divisors (36001).

3697391 is a wasteful number, since it uses less digits than its factorization.

3697391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36000.

The product of its digits is 30618, while the sum is 38.

The square root of 3697391 is about 1922.8601093163. The cubic root of 3697391 is about 154.6316748732.

The spelling of 3697391 in words is "three million, six hundred ninety-seven thousand, three hundred ninety-one".