724040491 has 2 divisors, whose sum is σ = 724040492. Its totient is φ = 724040490.

The previous prime is 724040461. The next prime is 724040497. The reversal of 724040491 is 194040427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 724040491 - 2¹⁵ = 724007723 is a prime.

It is not a weakly prime, because it can be changed into another prime (724040497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362020245 + 362020246.

It is an arithmetic number, because the mean of its divisors is an integer number (362020246).

Almost surely, 2^724040491 is an apocalyptic number.

724040491 is a deficient number, since it is larger than the sum of its proper divisors (1).

724040491 is an equidigital number, since it uses as much as digits as its factorization.

724040491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 724040491 is about 26908.0005017095. Note that the first 3 decimals coincide. The cubic root of 724040491 is about 897.9544039130.

The spelling of 724040491 in words is "seven hundred twenty-four million, forty thousand, four hundred ninety-one".