73919873 has 4 divisors (see below), whose sum is σ = 74932548. Its totient is φ = 72907200.

The previous prime is 73919863. The next prime is 73919897. The reversal of 73919873 is 37891937.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37891937 = 223 ⋅169919.

It can be written as a sum of positive squares in 2 ways, for example, as 50027329 + 23892544 = 7073^2 + 4888^2 .

It is a cyclic number.

It is not a de Polignac number, because 73919873 - 2⁶ = 73919809 is a prime.

It is a super-2 number, since 2×73919873² = 10928295248672258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73919803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506228 + ... + 506373.

It is an arithmetic number, because the mean of its divisors is an integer number (18733137).

Almost surely, 2^73919873 is an apocalyptic number.

73919873 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

73919873 is a deficient number, since it is larger than the sum of its proper divisors (1012675).

73919873 is a wasteful number, since it uses less digits than its factorization.

73919873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012674.

The product of its digits is 285768, while the sum is 47.

The square root of 73919873 is about 8597.6667183603. Note that the first 3 decimals coincide. The cubic root of 73919873 is about 419.6820590764.

The spelling of 73919873 in words is "seventy-three million, nine hundred nineteen thousand, eight hundred seventy-three".