999722653 has 2 divisors, whose sum is σ = 999722654. Its totient is φ = 999722652.

The previous prime is 999722617. The next prime is 999722657. The reversal of 999722653 is 356227999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 893591449 + 106131204 = 29893^2 + 10302^2 .

It is a cyclic number.

It is not a de Polignac number, because 999722653 - 2¹⁷ = 999591581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999722653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999722657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499861326 + 499861327.

It is an arithmetic number, because the mean of its divisors is an integer number (499861327).

Almost surely, 2^999722653 is an apocalyptic number.

It is an amenable number.

999722653 is a deficient number, since it is larger than the sum of its proper divisors (1).

999722653 is an equidigital number, since it uses as much as digits as its factorization.

999722653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 52.

The square root of 999722653 is about 31618.3910564722. The cubic root of 999722653 is about 999.9075424519.

The spelling of 999722653 in words is "nine hundred ninety-nine million, seven hundred twenty-two thousand, six hundred fifty-three".