73821345 has 16 divisors (see below), whose sum is σ = 127200192. Its totient is φ = 36342720.

The previous prime is 73821343. The next prime is 73821347. The reversal of 73821345 is 54312837.

It is an interprime number because it is at equal distance from previous prime (73821343) and next prime (73821347).

It is not a de Polignac number, because 73821345 - 2¹ = 73821343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73821343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189091 + ... + 189480.

It is an arithmetic number, because the mean of its divisors is an integer number (7950012).

Almost surely, 2^73821345 is an apocalyptic number.

It is an amenable number.

73821345 is a deficient number, since it is larger than the sum of its proper divisors (53378847).

73821345 is a wasteful number, since it uses less digits than its factorization.

73821345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378592.

The product of its digits is 20160, while the sum is 33.

The square root of 73821345 is about 8591.9348810381. The cubic root of 73821345 is about 419.4955110486.

The spelling of 73821345 in words is "seventy-three million, eight hundred twenty-one thousand, three hundred forty-five".