99687169 has 2 divisors, whose sum is σ = 99687170. Its totient is φ = 99687168.

The previous prime is 99687163. The next prime is 99687173. The reversal of 99687169 is 96178699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 23648769 = 8720^2 + 4863^2 .

It is a cyclic number.

It is not a de Polignac number, because 99687169 - 2¹¹ = 99685121 is a prime.

It is a super-2 number, since 2×99687169² = 19875063326469122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99687163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49843584 + 49843585.

It is an arithmetic number, because the mean of its divisors is an integer number (49843585).

Almost surely, 2^99687169 is an apocalyptic number.

It is an amenable number.

99687169 is a deficient number, since it is larger than the sum of its proper divisors (1).

99687169 is an equidigital number, since it uses as much as digits as its factorization.

99687169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 55.

The square root of 99687169 is about 9984.3461979240. The cubic root of 99687169 is about 463.6743668114.

It can be divided in two parts, 99687 and 169, that added together give a square (99856 = 316²).

The spelling of 99687169 in words is "ninety-nine million, six hundred eighty-seven thousand, one hundred sixty-nine".