73000281 has 4 divisors (see below), whose sum is σ = 97333712. Its totient is φ = 48666852.

The previous prime is 73000273. The next prime is 73000289. The reversal of 73000281 is 18200037.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18200037 = 3 ⋅6066679.

It is an interprime number because it is at equal distance from previous prime (73000273) and next prime (73000289).

It is not a de Polignac number, because 73000281 - 2³ = 73000273 is a prime.

It is a super-2 number, since 2×73000281² = 10658082052157922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73000289) 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, 12166711 + ... + 12166716.

It is an arithmetic number, because the mean of its divisors is an integer number (24333428).

Almost surely, 2^73000281 is an apocalyptic number.

It is an amenable number.

73000281 is a deficient number, since it is larger than the sum of its proper divisors (24333431).

73000281 is a wasteful number, since it uses less digits than its factorization.

73000281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24333430.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 73000281 is about 8544.0201895829. The cubic root of 73000281 is about 417.9344558905.

The spelling of 73000281 in words is "seventy-three million, two hundred eighty-one", and thus it is an aban number.