99389947 has 2 divisors, whose sum is σ = 99389948. Its totient is φ = 99389946.

The previous prime is 99389921. The next prime is 99389951. The reversal of 99389947 is 74998399.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99389947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99389891 and 99389900.

It is not a weakly prime, because it can be changed into another prime (99389977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49694973 + 49694974.

It is an arithmetic number, because the mean of its divisors is an integer number (49694974).

Almost surely, 2^99389947 is an apocalyptic number.

99389947 is a deficient number, since it is larger than the sum of its proper divisors (1).

99389947 is an equidigital number, since it uses as much as digits as its factorization.

99389947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 58.

The square root of 99389947 is about 9969.4506869737. The cubic root of 99389947 is about 463.2130857261.

The spelling of 99389947 in words is "ninety-nine million, three hundred eighty-nine thousand, nine hundred forty-seven".