724040287 has 2 divisors, whose sum is σ = 724040288. Its totient is φ = 724040286.

The previous prime is 724040281. The next prime is 724040329. The reversal of 724040287 is 782040427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 724040287 - 2¹⁹ = 723515999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724040281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362020143 + 362020144.

It is an arithmetic number, because the mean of its divisors is an integer number (362020144).

Almost surely, 2^724040287 is an apocalyptic number.

724040287 is a deficient number, since it is larger than the sum of its proper divisors (1).

724040287 is an equidigital number, since it uses as much as digits as its factorization.

724040287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 724040287 is about 26907.9967110151. The cubic root of 724040287 is about 897.9543195795.

The spelling of 724040287 in words is "seven hundred twenty-four million, forty thousand, two hundred eighty-seven".