73945891 has 8 divisors (see below), whose sum is σ = 77918480. Its totient is φ = 69981408.

The previous prime is 73945889. The next prime is 73945933. The reversal of 73945891 is 19854937.

It is a happy number.

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

It is not a de Polignac number, because 73945891 - 2¹ = 73945889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73945811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29125 + ... + 31561.

It is an arithmetic number, because the mean of its divisors is an integer number (9739810).

Almost surely, 2^73945891 is an apocalyptic number.

73945891 is a deficient number, since it is larger than the sum of its proper divisors (3972589).

73945891 is a wasteful number, since it uses less digits than its factorization.

73945891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053.

The product of its digits is 272160, while the sum is 46.

The square root of 73945891 is about 8599.1796701778. The cubic root of 73945891 is about 419.7312925978.

The spelling of 73945891 in words is "seventy-three million, nine hundred forty-five thousand, eight hundred ninety-one".