73312361 has 4 divisors (see below), whose sum is σ = 73333632. Its totient is φ = 73291092.

The previous prime is 73312357. The next prime is 73312363. The reversal of 73312361 is 16321337.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16321337 = 1277 ⋅12781.

It is a cyclic number.

It is not a de Polignac number, because 73312361 - 2² = 73312357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73312361.

It is not an unprimeable number, because it can be changed into a prime (73312363) 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, 4145 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (18333408).

Almost surely, 2^73312361 is an apocalyptic number.

It is an amenable number.

73312361 is a deficient number, since it is larger than the sum of its proper divisors (21271).

73312361 is a wasteful number, since it uses less digits than its factorization.

73312361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21270.

The product of its digits is 2268, while the sum is 26.

The square root of 73312361 is about 8562.2637777634. The cubic root of 73312361 is about 418.5291730607.

Adding to 73312361 its reverse (16321337), we get a palindrome (89633698).

The spelling of 73312361 in words is "seventy-three million, three hundred twelve thousand, three hundred sixty-one".