99911663 has 2 divisors, whose sum is σ = 99911664. Its totient is φ = 99911662.

The previous prime is 99911639. The next prime is 99911687. The reversal of 99911663 is 36611999.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (99911639) and next prime (99911687).

It is a cyclic number.

It is not a de Polignac number, because 99911663 - 2⁶ = 99911599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99911263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49955831 + 49955832.

It is an arithmetic number, because the mean of its divisors is an integer number (49955832).

Almost surely, 2^99911663 is an apocalyptic number.

99911663 is a deficient number, since it is larger than the sum of its proper divisors (1).

99911663 is an equidigital number, since it uses as much as digits as its factorization.

99911663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 44.

The square root of 99911663 is about 9995.5821741407. The cubic root of 99911663 is about 464.0221684191.

The spelling of 99911663 in words is "ninety-nine million, nine hundred eleven thousand, six hundred sixty-three".