87168553 has 2 divisors, whose sum is σ = 87168554. Its totient is φ = 87168552.

The previous prime is 87168533. The next prime is 87168569. The reversal of 87168553 is 35586178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52027369 + 35141184 = 7213^2 + 5928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87168553 is a prime.

It is a super-2 number, since 2×87168553² = 15196713264227618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87168533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43584276 + 43584277.

It is an arithmetic number, because the mean of its divisors is an integer number (43584277).

Almost surely, 2^87168553 is an apocalyptic number.

It is an amenable number.

87168553 is a deficient number, since it is larger than the sum of its proper divisors (1).

87168553 is an equidigital number, since it uses as much as digits as its factorization.

87168553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 87168553 is about 9336.4100702572. The cubic root of 87168553 is about 443.3907332668.

The spelling of 87168553 in words is "eighty-seven million, one hundred sixty-eight thousand, five hundred fifty-three".