87775147 has 2 divisors, whose sum is σ = 87775148. Its totient is φ = 87775146.

The previous prime is 87775139. The next prime is 87775151. The reversal of 87775147 is 74157778.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87775147 - 2³ = 87775139 is a prime.

It is a super-3 number, since 3×87775147³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87775097 and 87775106.

It is not a weakly prime, because it can be changed into another prime (87775747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43887573 + 43887574.

It is an arithmetic number, because the mean of its divisors is an integer number (43887574).

Almost surely, 2^87775147 is an apocalyptic number.

87775147 is a deficient number, since it is larger than the sum of its proper divisors (1).

87775147 is an equidigital number, since it uses as much as digits as its factorization.

87775147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384160, while the sum is 46.

The square root of 87775147 is about 9368.8391490088. The cubic root of 87775147 is about 444.4168551462.

It can be divided in two parts, 8777 and 5147, that added together give a square (13924 = 118²).

The spelling of 87775147 in words is "eighty-seven million, seven hundred seventy-five thousand, one hundred forty-seven".