3124621621 has 8 divisors (see below), whose sum is σ = 3500805024. Its totient is φ = 2763792720.

The previous prime is 3124621613. The next prime is 3124621639. The reversal of 3124621621 is 1261264213.

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

It is a cyclic number.

It is not a de Polignac number, because 3124621621 - 2³ = 3124621613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3124621621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3124621601) 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 7 ways as a sum of consecutive naturals, for example, 3838195 + ... + 3839008.

It is an arithmetic number, because the mean of its divisors is an integer number (437600628).

Almost surely, 2^3124621621 is an apocalyptic number.

It is an amenable number.

3124621621 is a deficient number, since it is larger than the sum of its proper divisors (376183403).

3124621621 is a wasteful number, since it uses less digits than its factorization.

3124621621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7677251.

The product of its digits is 3456, while the sum is 28.

The square root of 3124621621 is about 55898.3150103829. The cubic root of 3124621621 is about 1461.9498594230.

Adding to 3124621621 its reverse (1261264213), we get a palindrome (4385885834).

The spelling of 3124621621 in words is "three billion, one hundred twenty-four million, six hundred twenty-one thousand, six hundred twenty-one".