731047 has 2 divisors, whose sum is σ = 731048. Its totient is φ = 731046.

The previous prime is 731041. The next prime is 731053. The reversal of 731047 is 740137.

It is a balanced prime because it is at equal distance from previous prime (731041) and next prime (731053).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-731047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (731041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365523 + 365524.

It is an arithmetic number, because the mean of its divisors is an integer number (365524).

2⁷³¹⁰⁴⁷ is an apocalyptic number.

731047 is a deficient number, since it is larger than the sum of its proper divisors (1).

731047 is an equidigital number, since it uses as much as digits as its factorization.

731047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 731047 is about 855.0128654003. The cubic root of 731047 is about 90.0841599597.

Subtracting from 731047 its sum of digits (22), we obtain a square (731025 = 855²).

The spelling of 731047 in words is "seven hundred thirty-one thousand, forty-seven".