99979963 has 2 divisors, whose sum is σ = 99979964. Its totient is φ = 99979962.

The previous prime is 99979961. The next prime is 99979967. The reversal of 99979963 is 36997999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99979963 - 2¹ = 99979961 is a prime.

Together with 99979961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99979961) 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, 49989981 + 49989982.

It is an arithmetic number, because the mean of its divisors is an integer number (49989982).

Almost surely, 2^99979963 is an apocalyptic number.

99979963 is a deficient number, since it is larger than the sum of its proper divisors (1).

99979963 is an equidigital number, since it uses as much as digits as its factorization.

99979963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7440174, while the sum is 61.

The square root of 99979963 is about 9998.9980998098. The cubic root of 99979963 is about 464.1278801187.

It can be divided in two parts, 9997996 and 3, that added together give a palindrome (9997999).

The spelling of 99979963 in words is "ninety-nine million, nine hundred seventy-nine thousand, nine hundred sixty-three".