9432661621 has 4 divisors (see below), whose sum is σ = 9432861472. Its totient is φ = 9432461772.

The previous prime is 9432661603. The next prime is 9432661627. The reversal of 9432661621 is 1261662349.

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 9432661621 - 2²³ = 9424273013 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 (9432661627) 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, 14710 + ... + 138136.

It is an arithmetic number, because the mean of its divisors is an integer number (2358215368).

Almost surely, 2^9432661621 is an apocalyptic number.

It is an amenable number.

9432661621 is a deficient number, since it is larger than the sum of its proper divisors (199851).

9432661621 is a wasteful number, since it uses less digits than its factorization.

9432661621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199850.

The product of its digits is 93312, while the sum is 40.

The square root of 9432661621 is about 97121.8905345237. The cubic root of 9432661621 is about 2112.8958255331.

The spelling of 9432661621 in words is "nine billion, four hundred thirty-two million, six hundred sixty-one thousand, six hundred twenty-one".