3613491 has 20 divisors (see below), whose sum is σ = 6170032. Its totient is φ = 2064528.

The previous prime is 3613481. The next prime is 3613513. The reversal of 3613491 is 1943163.

3613491 is a `hidden beast` number, since 3 + 613 + 49 + 1 = 666.

It is not a de Polignac number, because 3613491 - 2⁹ = 3612979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3613481) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2620 + ... + 3753.

Almost surely, 2^3613491 is an apocalyptic number.

3613491 is a deficient number, since it is larger than the sum of its proper divisors (2556541).

3613491 is an equidigital number, since it uses as much as digits as its factorization.

3613491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6392 (or 6383 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 3613491 is about 1900.9184622177. The cubic root of 3613491 is about 153.4530974627.

The spelling of 3613491 in words is "three million, six hundred thirteen thousand, four hundred ninety-one".