3740820991 has 6 divisors (see below), whose sum is σ = 3829841880. Its totient is φ = 3653823348.

The previous prime is 3740820989. The next prime is 3740821003. The reversal of 3740820991 is 1990280473.

It is not a de Polignac number, because 3740820991 - 2¹ = 3740820989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3740820961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1009731 + ... + 1013428.

It is an arithmetic number, because the mean of its divisors is an integer number (638306980).

Almost surely, 2^3740820991 is an apocalyptic number.

3740820991 is a deficient number, since it is larger than the sum of its proper divisors (89020889).

3740820991 is an equidigital number, since it uses as much as digits as its factorization.

3740820991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023245 (or 2023202 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 3740820991 is about 61162.2513565353. The cubic root of 3740820991 is about 1552.3476033007.

The spelling of 3740820991 in words is "three billion, seven hundred forty million, eight hundred twenty thousand, nine hundred ninety-one".