722474009 has 2 divisors, whose sum is σ = 722474010. Its totient is φ = 722474008.

The previous prime is 722473981. The next prime is 722474017. The reversal of 722474009 is 900474227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714225625 + 8248384 = 26725^2 + 2872^2 .

It is an emirp because it is prime and its reverse (900474227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 722474009 - 2²⁰ = 721425433 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 722474009.

It is not a weakly prime, because it can be changed into another prime (722474059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361237004 + 361237005.

It is an arithmetic number, because the mean of its divisors is an integer number (361237005).

Almost surely, 2^722474009 is an apocalyptic number.

It is an amenable number.

722474009 is a deficient number, since it is larger than the sum of its proper divisors (1).

722474009 is an equidigital number, since it uses as much as digits as its factorization.

722474009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 722474009 is about 26878.8766320321. The cubic root of 722474009 is about 897.3063531127.

The spelling of 722474009 in words is "seven hundred twenty-two million, four hundred seventy-four thousand, nine".