3780691 has 4 divisors (see below), whose sum is σ = 3790800. Its totient is φ = 3770584.

The previous prime is 3780653. The next prime is 3780709. The reversal of 3780691 is 1960873.

3780691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1960873 = 139 ⋅14107.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3780691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3780611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4471 + ... + 5248.

It is an arithmetic number, because the mean of its divisors is an integer number (947700).

Almost surely, 2^3780691 is an apocalyptic number.

3780691 is a deficient number, since it is larger than the sum of its proper divisors (10109).

3780691 is an equidigital number, since it uses as much as digits as its factorization.

3780691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10108.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 3780691 is about 1944.3999074265. The cubic root of 3780691 is about 155.7843145762.

The spelling of 3780691 in words is "three million, seven hundred eighty thousand, six hundred ninety-one".