99722647 has 2 divisors, whose sum is σ = 99722648. Its totient is φ = 99722646.

The previous prime is 99722639. The next prime is 99722657. The reversal of 99722647 is 74622799.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (74622799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99722647 - 2³ = 99722639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99722597 and 99722606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99722657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49861323 + 49861324.

It is an arithmetic number, because the mean of its divisors is an integer number (49861324).

Almost surely, 2^99722647 is an apocalyptic number.

99722647 is a deficient number, since it is larger than the sum of its proper divisors (1).

99722647 is an equidigital number, since it uses as much as digits as its factorization.

99722647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The square root of 99722647 is about 9986.1227210565. The cubic root of 99722647 is about 463.7293664943.

The spelling of 99722647 in words is "ninety-nine million, seven hundred twenty-two thousand, six hundred forty-seven".