73993391 has 8 divisors (see below), whose sum is σ = 78027120. Its totient is φ = 69973632.

The previous prime is 73993363. The next prime is 73993433. The reversal of 73993391 is 19339937.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73993391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73993351) 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 7 ways as a sum of consecutive naturals, for example, 8471 + ... + 14823.

It is an arithmetic number, because the mean of its divisors is an integer number (9753390).

Almost surely, 2^73993391 is an apocalyptic number.

73993391 is a deficient number, since it is larger than the sum of its proper divisors (4033729).

73993391 is a wasteful number, since it uses less digits than its factorization.

73993391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6985.

The product of its digits is 137781, while the sum is 44.

The square root of 73993391 is about 8601.9411181430. The cubic root of 73993391 is about 419.8211464476.

The spelling of 73993391 in words is "seventy-three million, nine hundred ninety-three thousand, three hundred ninety-one".