3991354403 has 4 divisors (see below), whose sum is σ = 4004106648. Its totient is φ = 3978602160.

The previous prime is 3991354363. The next prime is 3991354417. The reversal of 3991354403 is 3044531993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3991354403 - 2²⁰ = 3990305827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3991354463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6375653 + ... + 6376278.

It is an arithmetic number, because the mean of its divisors is an integer number (1001026662).

Almost surely, 2^3991354403 is an apocalyptic number.

3991354403 is a deficient number, since it is larger than the sum of its proper divisors (12752245).

3991354403 is a wasteful number, since it uses less digits than its factorization.

3991354403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12752244.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 3991354403 is about 63177.1667851606. The cubic root of 3991354403 is about 1586.2565578544.

The spelling of 3991354403 in words is "three billion, nine hundred ninety-one million, three hundred fifty-four thousand, four hundred three".