99981041 has 2 divisors, whose sum is σ = 99981042. Its totient is φ = 99981040.

The previous prime is 99980981. The next prime is 99981047. The reversal of 99981041 is 14018999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82882816 + 17098225 = 9104^2 + 4135^2 .

It is a cyclic number.

It is not a de Polignac number, because 99981041 - 2²² = 95786737 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99981041.

It is not a weakly prime, because it can be changed into another prime (99981047) 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, 49990520 + 49990521.

It is an arithmetic number, because the mean of its divisors is an integer number (49990521).

Almost surely, 2^99981041 is an apocalyptic number.

It is an amenable number.

99981041 is a deficient number, since it is larger than the sum of its proper divisors (1).

99981041 is an equidigital number, since it uses as much as digits as its factorization.

99981041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 99981041 is about 9999.0520050653. The cubic root of 99981041 is about 464.1295482131.

The spelling of 99981041 in words is "ninety-nine million, nine hundred eighty-one thousand, forty-one".