731887 has 4 divisors (see below), whose sum is σ = 788200. Its totient is φ = 675576.

The previous prime is 731881. The next prime is 731893. The reversal of 731887 is 788137.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (731881) and next prime (731893).

It is a cyclic number.

It is not a de Polignac number, because 731887 - 2¹⁵ = 699119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28137 + ... + 28162.

It is an arithmetic number, because the mean of its divisors is an integer number (197050).

2⁷³¹⁸⁸⁷ is an apocalyptic number.

731887 is a deficient number, since it is larger than the sum of its proper divisors (56313).

731887 is a wasteful number, since it uses less digits than its factorization.

731887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56312.

The product of its digits is 9408, while the sum is 34.

The square root of 731887 is about 855.5039450523. The cubic root of 731887 is about 90.1186500951.

The spelling of 731887 in words is "seven hundred thirty-one thousand, eight hundred eighty-seven".