73431443 has 4 divisors (see below), whose sum is σ = 73455840. Its totient is φ = 73407048.

The previous prime is 73431439. The next prime is 73431473. The reversal of 73431443 is 34413437.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73431443 - 2² = 73431439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73431473) 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, 6923 + ... + 13956.

It is an arithmetic number, because the mean of its divisors is an integer number (18363960).

Almost surely, 2^73431443 is an apocalyptic number.

73431443 is a deficient number, since it is larger than the sum of its proper divisors (24397).

73431443 is a wasteful number, since it uses less digits than its factorization.

73431443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24396.

The product of its digits is 12096, while the sum is 29.

The square root of 73431443 is about 8569.2148415126. The cubic root of 73431443 is about 418.7556575162.

The spelling of 73431443 in words is "seventy-three million, four hundred thirty-one thousand, four hundred forty-three".