73431133 has 4 divisors (see below), whose sum is σ = 73991808. Its totient is φ = 72870460.

The previous prime is 73431131. The next prime is 73431191. The reversal of 73431133 is 33113437.

It is a happy number.

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 73431133 - 2¹ = 73431131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73431098 and 73431107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73431131) 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, 280141 + ... + 280402.

It is an arithmetic number, because the mean of its divisors is an integer number (18497952).

Almost surely, 2^73431133 is an apocalyptic number.

It is an amenable number.

73431133 is a deficient number, since it is larger than the sum of its proper divisors (560675).

73431133 is a wasteful number, since it uses less digits than its factorization.

73431133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560674.

The product of its digits is 2268, while the sum is 25.

The square root of 73431133 is about 8569.1967534886. The cubic root of 73431133 is about 418.7550682389.

The spelling of 73431133 in words is "seventy-three million, four hundred thirty-one thousand, one hundred thirty-three".