99158641 has 2 divisors, whose sum is σ = 99158642. Its totient is φ = 99158640.

The previous prime is 99158599. The next prime is 99158651. The reversal of 99158641 is 14685199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93683041 + 5475600 = 9679^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 99158641 - 2⁷ = 99158513 is a prime.

It is not a weakly prime, because it can be changed into another prime (99158651) 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, 49579320 + 49579321.

It is an arithmetic number, because the mean of its divisors is an integer number (49579321).

Almost surely, 2^99158641 is an apocalyptic number.

It is an amenable number.

99158641 is a deficient number, since it is larger than the sum of its proper divisors (1).

99158641 is an equidigital number, since it uses as much as digits as its factorization.

99158641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 43.

The square root of 99158641 is about 9957.8431901692. The cubic root of 99158641 is about 462.8534678973.

It can be divided in two parts, 99158 and 641, that added together give a palindrome (99799).

The spelling of 99158641 in words is "ninety-nine million, one hundred fifty-eight thousand, six hundred forty-one".