72899273 has 4 divisors (see below), whose sum is σ = 73455888. Its totient is φ = 72342660.

The previous prime is 72899249. The next prime is 72899291. The reversal of 72899273 is 37299827.

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.

It is a cyclic number.

It is not a de Polignac number, because 72899273 - 2¹⁰ = 72898249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72899573) 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, 278111 + ... + 278372.

It is an arithmetic number, because the mean of its divisors is an integer number (18363972).

Almost surely, 2^72899273 is an apocalyptic number.

It is an amenable number.

72899273 is a deficient number, since it is larger than the sum of its proper divisors (556615).

72899273 is a wasteful number, since it uses less digits than its factorization.

72899273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556614.

The product of its digits is 381024, while the sum is 47.

The square root of 72899273 is about 8538.1071087215. The cubic root of 72899273 is about 417.7416063641.

It can be divided in two parts, 728 and 99273, that added together give a palindrome (100001).

The spelling of 72899273 in words is "seventy-two million, eight hundred ninety-nine thousand, two hundred seventy-three".