8722429 has 2 divisors, whose sum is σ = 8722430. Its totient is φ = 8722428.

The previous prime is 8722423. The next prime is 8722447. The reversal of 8722429 is 9242278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7562500 + 1159929 = 2750^2 + 1077^2 .

It is a cyclic number.

It is not a de Polignac number, because 8722429 - 2⁹ = 8721917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8722394 and 8722403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8722423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4361214 + 4361215.

It is an arithmetic number, because the mean of its divisors is an integer number (4361215).

Almost surely, 2^8722429 is an apocalyptic number.

It is an amenable number.

8722429 is a deficient number, since it is larger than the sum of its proper divisors (1).

8722429 is an equidigital number, since it uses as much as digits as its factorization.

8722429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 8722429 is about 2953.3758650060. The cubic root of 8722429 is about 205.8476030618.

The spelling of 8722429 in words is "eight million, seven hundred twenty-two thousand, four hundred twenty-nine".