99947651 has 2 divisors, whose sum is σ = 99947652. Its totient is φ = 99947650.

The previous prime is 99947611. The next prime is 99947677. The reversal of 99947651 is 15674999.

It is a strong prime.

It is an emirp because it is prime and its reverse (15674999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99947651 - 2⁶ = 99947587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99947651.

It is not a weakly prime, because it can be changed into another prime (99947611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49973825 + 49973826.

It is an arithmetic number, because the mean of its divisors is an integer number (49973826).

Almost surely, 2^99947651 is an apocalyptic number.

99947651 is a deficient number, since it is larger than the sum of its proper divisors (1).

99947651 is an equidigital number, since it uses as much as digits as its factorization.

99947651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 50.

The square root of 99947651 is about 9997.3822073581. The cubic root of 99947651 is about 464.0778750460.

The spelling of 99947651 in words is "ninety-nine million, nine hundred forty-seven thousand, six hundred fifty-one".