3781791 has 12 divisors (see below), whose sum is σ = 5882968. Its totient is φ = 2327184.

The previous prime is 3781781. The next prime is 3781801. The reversal of 3781791 is 1971873.

It is an interprime number because it is at equal distance from previous prime (3781781) and next prime (3781801).

It is not a de Polignac number, because 3781791 - 2⁵ = 3781759 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 (3781711) 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, 16045 + ... + 16278.

Almost surely, 2^3781791 is an apocalyptic number.

3781791 is a deficient number, since it is larger than the sum of its proper divisors (2101177).

3781791 is a wasteful number, since it uses less digits than its factorization.

3781791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32342 (or 32339 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 3781791 is about 1944.6827504763. The cubic root of 3781791 is about 155.7994217025.

The spelling of 3781791 in words is "three million, seven hundred eighty-one thousand, seven hundred ninety-one".