7421533989 has 4 divisors (see below), whose sum is σ = 9895378656. Its totient is φ = 4947689324.

The previous prime is 7421533981. The next prime is 7421534023. The reversal of 7421533989 is 9893351247.

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 7421533989 - 2³ = 7421533981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421533981) 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, 1236922329 + ... + 1236922334.

It is an arithmetic number, because the mean of its divisors is an integer number (2473844664).

Almost surely, 2^7421533989 is an apocalyptic number.

It is an amenable number.

7421533989 is a deficient number, since it is larger than the sum of its proper divisors (2473844667).

7421533989 is a wasteful number, since it uses less digits than its factorization.

7421533989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473844666.

The product of its digits is 1632960, while the sum is 51.

The square root of 7421533989 is about 86148.3255147771. The cubic root of 7421533989 is about 1950.5835631477.

The spelling of 7421533989 in words is "seven billion, four hundred twenty-one million, five hundred thirty-three thousand, nine hundred eighty-nine".