73321405 has 4 divisors (see below), whose sum is σ = 87985692. Its totient is φ = 58657120.

The previous prime is 73321403. The next prime is 73321421. The reversal of 73321405 is 50412337.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50412337 = 131 ⋅384827.

It can be written as a sum of positive squares in 2 ways, for example, as 42341049 + 30980356 = 6507^2 + 5566^2 .

It is not a de Polignac number, because 73321405 - 2¹ = 73321403 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 73321405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73321403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7332136 + ... + 7332145.

It is an arithmetic number, because the mean of its divisors is an integer number (21996423).

Almost surely, 2^73321405 is an apocalyptic number.

It is an amenable number.

73321405 is a deficient number, since it is larger than the sum of its proper divisors (14664287).

73321405 is a wasteful number, since it uses less digits than its factorization.

73321405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14664286.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 73321405 is about 8562.7918928350. The cubic root of 73321405 is about 418.5463826288.

The spelling of 73321405 in words is "seventy-three million, three hundred twenty-one thousand, four hundred five".