87826169 has 2 divisors, whose sum is σ = 87826170. Its totient is φ = 87826168.

The previous prime is 87826159. The next prime is 87826241. The reversal of 87826169 is 96162878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 37982569 = 7060^2 + 6163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87826169 is a prime.

It is a super-2 number, since 2×87826169² = 15426871922433122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87826139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43913084 + 43913085.

It is an arithmetic number, because the mean of its divisors is an integer number (43913085).

Almost surely, 2^87826169 is an apocalyptic number.

It is an amenable number.

87826169 is a deficient number, since it is larger than the sum of its proper divisors (1).

87826169 is an equidigital number, since it uses as much as digits as its factorization.

87826169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 87826169 is about 9371.5617161709. The cubic root of 87826169 is about 444.5029487823.

The spelling of 87826169 in words is "eighty-seven million, eight hundred twenty-six thousand, one hundred sixty-nine".