99687769 has 4 divisors (see below), whose sum is σ = 102119220. Its totient is φ = 97256320.

The previous prime is 99687767. The next prime is 99687827. The reversal of 99687769 is 96778699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96778699 = 127 ⋅762037.

It can be written as a sum of positive squares in 2 ways, for example, as 51912025 + 47775744 = 7205^2 + 6912^2 .

It is a cyclic number.

It is not a de Polignac number, because 99687769 - 2¹ = 99687767 is a prime.

It is a super-2 number, since 2×99687769² = 19875302576394722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99687767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215664 + ... + 1215745.

It is an arithmetic number, because the mean of its divisors is an integer number (25529805).

Almost surely, 2^99687769 is an apocalyptic number.

It is an amenable number.

99687769 is a deficient number, since it is larger than the sum of its proper divisors (2431451).

99687769 is a wasteful number, since it uses less digits than its factorization.

99687769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431450.

The product of its digits is 10287648, while the sum is 61.

The square root of 99687769 is about 9984.3762449139. The cubic root of 99687769 is about 463.6752970684.

The spelling of 99687769 in words is "ninety-nine million, six hundred eighty-seven thousand, seven hundred sixty-nine".