3811491 has 12 divisors (see below), whose sum is σ = 5745168. Its totient is φ = 2430384.

The previous prime is 3811487. The next prime is 3811501. The reversal of 3811491 is 1941183.

It is not a de Polignac number, because 3811491 - 2² = 3811487 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9000 + ... + 9413.

It is an arithmetic number, because the mean of its divisors is an integer number (478764).

Almost surely, 2^3811491 is an apocalyptic number.

3811491 is a deficient number, since it is larger than the sum of its proper divisors (1933677).

3811491 is a wasteful number, since it uses less digits than its factorization.

3811491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18442 (or 18439 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 3811491 is about 1952.3040234554. The cubic root of 3811491 is about 156.2062115163.

The spelling of 3811491 in words is "three million, eight hundred eleven thousand, four hundred ninety-one".