9288732421 has 4 divisors (see below), whose sum is σ = 9289085152. Its totient is φ = 9288379692.

The previous prime is 9288732379. The next prime is 9288732443. The reversal of 9288732421 is 1242378829.

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 9288732421 - 2⁹ = 9288731909 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 (9288738421) 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, 133371 + ... + 190696.

It is an arithmetic number, because the mean of its divisors is an integer number (2322271288).

Almost surely, 2^9288732421 is an apocalyptic number.

It is an amenable number.

9288732421 is a deficient number, since it is larger than the sum of its proper divisors (352731).

9288732421 is a wasteful number, since it uses less digits than its factorization.

9288732421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352730.

The product of its digits is 387072, while the sum is 46.

The square root of 9288732421 is about 96378.0702286573. The cubic root of 9288732421 is about 2102.0940880595.

The spelling of 9288732421 in words is "nine billion, two hundred eighty-eight million, seven hundred thirty-two thousand, four hundred twenty-one".