724622989 has 2 divisors, whose sum is σ = 724622990. Its totient is φ = 724622988.

The previous prime is 724622917. The next prime is 724622993. The reversal of 724622989 is 989226427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 686702025 + 37920964 = 26205^2 + 6158^2 .

It is a cyclic number.

It is not a de Polignac number, because 724622989 - 2¹³ = 724614797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724622089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362311494 + 362311495.

It is an arithmetic number, because the mean of its divisors is an integer number (362311495).

Almost surely, 2^724622989 is an apocalyptic number.

It is an amenable number.

724622989 is a deficient number, since it is larger than the sum of its proper divisors (1).

724622989 is an equidigital number, since it uses as much as digits as its factorization.

724622989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 724622989 is about 26918.8222067757. The cubic root of 724622989 is about 898.1951438741.

The spelling of 724622989 in words is "seven hundred twenty-four million, six hundred twenty-two thousand, nine hundred eighty-nine".