3121435663 has 4 divisors (see below), whose sum is σ = 3222127168. Its totient is φ = 3020744160.

The previous prime is 3121435649. The next prime is 3121435687. The reversal of 3121435663 is 3665341213.

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

It is not a de Polignac number, because 3121435663 - 2⁵ = 3121435631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121435963) 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, 50345706 + ... + 50345767.

It is an arithmetic number, because the mean of its divisors is an integer number (805531792).

Almost surely, 2^3121435663 is an apocalyptic number.

3121435663 is a deficient number, since it is larger than the sum of its proper divisors (100691505).

3121435663 is a wasteful number, since it uses less digits than its factorization.

3121435663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100691504.

The product of its digits is 38880, while the sum is 34.

The square root of 3121435663 is about 55869.8099424009. The cubic root of 3121435663 is about 1461.4528077945.

Adding to 3121435663 its reverse (3665341213), we get a palindrome (6786776876).

The spelling of 3121435663 in words is "three billion, one hundred twenty-one million, four hundred thirty-five thousand, six hundred sixty-three".