99669769 has 2 divisors, whose sum is σ = 99669770. Its totient is φ = 99669768.

The previous prime is 99669767. The next prime is 99669809. The reversal of 99669769 is 96796699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88360000 + 11309769 = 9400^2 + 3363^2 .

It is a cyclic number.

It is not a de Polignac number, because 99669769 - 2¹ = 99669767 is a prime.

It is a super-2 number, since 2×99669769² = 19868125705026722, which contains 22 as substring.

Together with 99669767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99669767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49834884 + 49834885.

It is an arithmetic number, because the mean of its divisors is an integer number (49834885).

Almost surely, 2^99669769 is an apocalyptic number.

It is an amenable number.

99669769 is a deficient number, since it is larger than the sum of its proper divisors (1).

99669769 is an equidigital number, since it uses as much as digits as its factorization.

99669769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9920232, while the sum is 61.

The square root of 99669769 is about 9983.4747958814. The cubic root of 99669769 is about 463.6473877343.

The spelling of 99669769 in words is "ninety-nine million, six hundred sixty-nine thousand, seven hundred sixty-nine".