724140247 has 2 divisors, whose sum is σ = 724140248. Its totient is φ = 724140246.

The previous prime is 724140163. The next prime is 724140259. The reversal of 724140247 is 742041427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 724140247 - 2²⁷ = 589922519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724140847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362070123 + 362070124.

It is an arithmetic number, because the mean of its divisors is an integer number (362070124).

Almost surely, 2^724140247 is an apocalyptic number.

724140247 is a deficient number, since it is larger than the sum of its proper divisors (1).

724140247 is an equidigital number, since it uses as much as digits as its factorization.

724140247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 724140247 is about 26909.8540873042. The cubic root of 724140247 is about 897.9956411215.

The spelling of 724140247 in words is "seven hundred twenty-four million, one hundred forty thousand, two hundred forty-seven".