73447389 has 12 divisors (see below), whose sum is σ = 107889600. Its totient is φ = 48134664.

The previous prime is 73447379. The next prime is 73447393. The reversal of 73447389 is 98374437.

It is a happy number.

It is not a de Polignac number, because 73447389 - 2⁵ = 73447357 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73447379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68629 + ... + 69690.

It is an arithmetic number, because the mean of its divisors is an integer number (8990800).

Almost surely, 2^73447389 is an apocalyptic number.

It is an amenable number.

73447389 is a deficient number, since it is larger than the sum of its proper divisors (34442211).

73447389 is a wasteful number, since it uses less digits than its factorization.

73447389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138384 (or 138381 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 73447389 is about 8570.1452146390. The cubic root of 73447389 is about 418.7859669411.

The spelling of 73447389 in words is "seventy-three million, four hundred forty-seven thousand, three hundred eighty-nine".