3993242291 has 4 divisors (see below), whose sum is σ = 3993569112. Its totient is φ = 3992915472.

The previous prime is 3993242287. The next prime is 3993242317. The reversal of 3993242291 is 1922423993.

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 3993242291 - 2² = 3993242287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3993212291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144341 + ... + 169766.

It is an arithmetic number, because the mean of its divisors is an integer number (998392278).

Almost surely, 2^3993242291 is an apocalyptic number.

3993242291 is a deficient number, since it is larger than the sum of its proper divisors (326821).

3993242291 is a wasteful number, since it uses less digits than its factorization.

3993242291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326820.

The product of its digits is 209952, while the sum is 44.

The square root of 3993242291 is about 63192.1062396246. The cubic root of 3993242291 is about 1586.5066152190.

The spelling of 3993242291 in words is "three billion, nine hundred ninety-three million, two hundred forty-two thousand, two hundred ninety-one".