99181963 has 2 divisors, whose sum is σ = 99181964. Its totient is φ = 99181962.

The previous prime is 99181939. The next prime is 99181967. The reversal of 99181963 is 36918199.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99181963 - 2¹³ = 99173771 is a prime.

It is not a weakly prime, because it can be changed into another prime (99181967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49590981 + 49590982.

It is an arithmetic number, because the mean of its divisors is an integer number (49590982).

Almost surely, 2^99181963 is an apocalyptic number.

99181963 is a deficient number, since it is larger than the sum of its proper divisors (1).

99181963 is an equidigital number, since it uses as much as digits as its factorization.

99181963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 46.

The square root of 99181963 is about 9959.0141580379. The cubic root of 99181963 is about 462.8897525898.

It can be divided in two parts, 9918196 and 3, that added together give a palindrome (9918199).

The spelling of 99181963 in words is "ninety-nine million, one hundred eighty-one thousand, nine hundred sixty-three".