3991942233 has 6 divisors (see below), whose sum is σ = 5766138794. Its totient is φ = 2661294816.

The previous prime is 3991942219. The next prime is 3991942271. The reversal of 3991942233 is 3322491993.

It can be written as a sum of positive squares in only one way, i.e., 3917758464 + 74183769 = 62592^2 + 8613^2 .

It is not a de Polignac number, because 3991942233 - 2¹⁶ = 3991876697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3991942333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221774560 + ... + 221774577.

Almost surely, 2^3991942233 is an apocalyptic number.

It is an amenable number.

3991942233 is a deficient number, since it is larger than the sum of its proper divisors (1774196561).

3991942233 is a wasteful number, since it uses less digits than its factorization.

3991942233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443549143 (or 443549140 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 3991942233 is about 63181.8188484630. The cubic root of 3991942233 is about 1586.3344264446.

The spelling of 3991942233 in words is "three billion, nine hundred ninety-one million, nine hundred forty-two thousand, two hundred thirty-three".