3991031234 has 8 divisors (see below), whose sum is σ = 5987766540. Its totient is φ = 1995109056.

The previous prime is 3991031227. The next prime is 3991031279. The reversal of 3991031234 is 4321301993.

It can be written as a sum of positive squares in 2 ways, for example, as 3960814225 + 30217009 = 62935^2 + 5497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3991031194 and 3991031203.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 190859 + ... + 210734.

Almost surely, 2^3991031234 is an apocalyptic number.

3991031234 is a deficient number, since it is larger than the sum of its proper divisors (1996735306).

3991031234 is a wasteful number, since it uses less digits than its factorization.

3991031234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406564.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 3991031234 is about 63174.6090925777. The cubic root of 3991031234 is about 1586.2137450871.

The spelling of 3991031234 in words is "three billion, nine hundred ninety-one million, thirty-one thousand, two hundred thirty-four".