8735612921 has 4 divisors (see below), whose sum is σ = 9983557632. Its totient is φ = 7487668212.

The previous prime is 8735612903. The next prime is 8735612923. The reversal of 8735612921 is 1292165378.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8735612921 - 2⁶ = 8735612857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8735612923) 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, 623972345 + ... + 623972358.

It is an arithmetic number, because the mean of its divisors is an integer number (2495889408).

Almost surely, 2^8735612921 is an apocalyptic number.

It is an amenable number.

8735612921 is a deficient number, since it is larger than the sum of its proper divisors (1247944711).

8735612921 is a wasteful number, since it uses less digits than its factorization.

8735612921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247944710.

The product of its digits is 181440, while the sum is 44.

The square root of 8735612921 is about 93464.5008599522. The cubic root of 8735612921 is about 2059.5126349651.

The spelling of 8735612921 in words is "eight billion, seven hundred thirty-five million, six hundred twelve thousand, nine hundred twenty-one".