73479989 has 4 divisors (see below), whose sum is σ = 80160000. Its totient is φ = 66799980.

The previous prime is 73479977. The next prime is 73480007. The reversal of 73479989 is 98997437.

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 73479989 - 2¹² = 73475893 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 (73479949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3339989 + ... + 3340010.

It is an arithmetic number, because the mean of its divisors is an integer number (20040000).

Almost surely, 2^73479989 is an apocalyptic number.

It is an amenable number.

73479989 is a deficient number, since it is larger than the sum of its proper divisors (6680011).

73479989 is a wasteful number, since it uses less digits than its factorization.

73479989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680010.

The product of its digits is 3429216, while the sum is 56.

The square root of 73479989 is about 8572.0469550744. The cubic root of 73479989 is about 418.8479178755.

The spelling of 73479989 in words is "seventy-three million, four hundred seventy-nine thousand, nine hundred eighty-nine".