99411661 has 2 divisors, whose sum is σ = 99411662. Its totient is φ = 99411660.

The previous prime is 99411649. The next prime is 99411679. The reversal of 99411661 is 16611499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90820900 + 8590761 = 9530^2 + 2931^2 .

It is a cyclic number.

It is not a de Polignac number, because 99411661 - 2¹⁵ = 99378893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99411661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99418661) 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, 49705830 + 49705831.

It is an arithmetic number, because the mean of its divisors is an integer number (49705831).

Almost surely, 2^99411661 is an apocalyptic number.

It is an amenable number.

99411661 is a deficient number, since it is larger than the sum of its proper divisors (1).

99411661 is an equidigital number, since it uses as much as digits as its factorization.

99411661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 99411661 is about 9970.5396544019. The cubic root of 99411661 is about 463.2468164231.

The spelling of 99411661 in words is "ninety-nine million, four hundred eleven thousand, six hundred sixty-one".