99420847 has 2 divisors, whose sum is σ = 99420848. Its totient is φ = 99420846.

The previous prime is 99420833. The next prime is 99420857. The reversal of 99420847 is 74802499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99420847 - 2⁷ = 99420719 is a prime.

It is equal to p_5729947 and since 99420847 and 5729947 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99420857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49710423 + 49710424.

It is an arithmetic number, because the mean of its divisors is an integer number (49710424).

Almost surely, 2^99420847 is an apocalyptic number.

99420847 is a deficient number, since it is larger than the sum of its proper divisors (1).

99420847 is an equidigital number, since it uses as much as digits as its factorization.

99420847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 99420847 is about 9971.0003008725. Note that the first 3 decimals coincide. The cubic root of 99420847 is about 463.2610845486.

The spelling of 99420847 in words is "ninety-nine million, four hundred twenty thousand, eight hundred forty-seven".