728471 has 2 divisors, whose sum is σ = 728472. Its totient is φ = 728470.

The previous prime is 728437. The next prime is 728477. The reversal of 728471 is 174827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728471 is a prime.

It is a super-3 number, since 3×728471³ = 1159733111991693333, which contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364235 + 364236.

It is an arithmetic number, because the mean of its divisors is an integer number (364236).

2⁷²⁸⁴⁷¹ is an apocalyptic number.

728471 is a deficient number, since it is larger than the sum of its proper divisors (1).

728471 is an equidigital number, since it uses as much as digits as its factorization.

728471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3136, while the sum is 29.

The square root of 728471 is about 853.5051259366. The cubic root of 728471 is about 89.9782251848.

The spelling of 728471 in words is "seven hundred twenty-eight thousand, four hundred seventy-one".