99989047 has 2 divisors, whose sum is σ = 99989048. Its totient is φ = 99989046.

The previous prime is 99989041. The next prime is 99989051. The reversal of 99989047 is 74098999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99989047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99989041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994523 + 49994524.

It is an arithmetic number, because the mean of its divisors is an integer number (49994524).

Almost surely, 2^99989047 is an apocalyptic number.

99989047 is a deficient number, since it is larger than the sum of its proper divisors (1).

99989047 is an equidigital number, since it uses as much as digits as its factorization.

99989047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 99989047 is about 9999.4523350032. The cubic root of 99989047 is about 464.1419363017.

The spelling of 99989047 in words is "ninety-nine million, nine hundred eighty-nine thousand, forty-seven".