3993669431 has 4 divisors (see below), whose sum is σ = 4131382200. Its totient is φ = 3855956664.

The previous prime is 3993669401. The next prime is 3993669443. The reversal of 3993669431 is 1349663993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1349663993 = 19 ⋅71034947.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3993669431 is a prime.

It is a super-2 number, since 2×3993669431² = 31898791048207727522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993669401) 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, 68856341 + ... + 68856398.

It is an arithmetic number, because the mean of its divisors is an integer number (1032845550).

Almost surely, 2^3993669431 is an apocalyptic number.

3993669431 is a deficient number, since it is larger than the sum of its proper divisors (137712769).

3993669431 is a wasteful number, since it uses less digits than its factorization.

3993669431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137712768.

The product of its digits is 2834352, while the sum is 53.

The square root of 3993669431 is about 63195.4858435316. The cubic root of 3993669431 is about 1586.5631804715.

The spelling of 3993669431 in words is "three billion, nine hundred ninety-three million, six hundred sixty-nine thousand, four hundred thirty-one".