99769081 has 2 divisors, whose sum is σ = 99769082. Its totient is φ = 99769080.

The previous prime is 99769079. The next prime is 99769123. The reversal of 99769081 is 18096799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99301225 + 467856 = 9965^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 99769081 - 2¹ = 99769079 is a prime.

It is a super-2 number, since 2×99769081² = 19907739047169122, which contains 22 as substring.

Together with 99769079, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99769181) 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, 49884540 + 49884541.

It is an arithmetic number, because the mean of its divisors is an integer number (49884541).

Almost surely, 2^99769081 is an apocalyptic number.

It is an amenable number.

99769081 is a deficient number, since it is larger than the sum of its proper divisors (1).

99769081 is an equidigital number, since it uses as much as digits as its factorization.

99769081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 99769081 is about 9988.4473768449. The cubic root of 99769081 is about 463.8013309838.

The spelling of 99769081 in words is "ninety-nine million, seven hundred sixty-nine thousand, eighty-one".