724765123 has 2 divisors, whose sum is σ = 724765124. Its totient is φ = 724765122.

The previous prime is 724765117. The next prime is 724765157. The reversal of 724765123 is 321567427.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 724765123 - 2⁹ = 724764611 is a prime.

It is not a weakly prime, because it can be changed into another prime (724765103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362382561 + 362382562.

It is an arithmetic number, because the mean of its divisors is an integer number (362382562).

Almost surely, 2^724765123 is an apocalyptic number.

724765123 is a deficient number, since it is larger than the sum of its proper divisors (1).

724765123 is an equidigital number, since it uses as much as digits as its factorization.

724765123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 37.

The square root of 724765123 is about 26921.4621259693. The cubic root of 724765123 is about 898.2538666971.

The spelling of 724765123 in words is "seven hundred twenty-four million, seven hundred sixty-five thousand, one hundred twenty-three".