99427897 has 2 divisors, whose sum is σ = 99427898. Its totient is φ = 99427896.

The previous prime is 99427891. The next prime is 99427901. The reversal of 99427897 is 79872499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99420841 + 7056 = 9971^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 99427897 - 2¹⁵ = 99395129 is a prime.

It is not a weakly prime, because it can be changed into another prime (99427891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49713948 + 49713949.

It is an arithmetic number, because the mean of its divisors is an integer number (49713949).

Almost surely, 2^99427897 is an apocalyptic number.

It is an amenable number.

99427897 is a deficient number, since it is larger than the sum of its proper divisors (1).

99427897 is an equidigital number, since it uses as much as digits as its factorization.

99427897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 55.

The square root of 99427897 is about 9971.3538198180. The cubic root of 99427897 is about 463.2720343429.

The spelling of 99427897 in words is "ninety-nine million, four hundred twenty-seven thousand, eight hundred ninety-seven".