731873 has 4 divisors (see below), whose sum is σ = 757140. Its totient is φ = 706608.

The previous prime is 731869. The next prime is 731881. The reversal of 731873 is 378137.

731873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 253009 = 692^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 731873 - 2² = 731869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 25237 = 731873 / (7 + 3 + 1 + 8 + 7 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731803) 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, 12590 + ... + 12647.

It is an arithmetic number, because the mean of its divisors is an integer number (189285).

2⁷³¹⁸⁷³ is an apocalyptic number.

It is an amenable number.

731873 is a deficient number, since it is larger than the sum of its proper divisors (25267).

731873 is a wasteful number, since it uses less digits than its factorization.

731873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25266.

The product of its digits is 3528, while the sum is 29.

The square root of 731873 is about 855.4957627014. The cubic root of 731873 is about 90.1180754758.

The spelling of 731873 in words is "seven hundred thirty-one thousand, eight hundred seventy-three".