724647871 has 2 divisors, whose sum is σ = 724647872. Its totient is φ = 724647870.

The previous prime is 724647863. The next prime is 724647883. The reversal of 724647871 is 178746427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 724647871 - 2³ = 724647863 is a prime.

It is a super-2 number, since 2×724647871² = 1050229073889665282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724647811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362323935 + 362323936.

It is an arithmetic number, because the mean of its divisors is an integer number (362323936).

Almost surely, 2^724647871 is an apocalyptic number.

724647871 is a deficient number, since it is larger than the sum of its proper divisors (1).

724647871 is an equidigital number, since it uses as much as digits as its factorization.

724647871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 526848, while the sum is 46.

The square root of 724647871 is about 26919.2843701314. The cubic root of 724647871 is about 898.2054244550.

The spelling of 724647871 in words is "seven hundred twenty-four million, six hundred forty-seven thousand, eight hundred seventy-one".