87774017 has 2 divisors, whose sum is σ = 87774018. Its totient is φ = 87774016.

The previous prime is 87774013. The next prime is 87774019. The reversal of 87774017 is 71047778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45576001 + 42198016 = 6751^2 + 6496^2 .

It is a cyclic number.

It is not a de Polignac number, because 87774017 - 2² = 87774013 is a prime.

Together with 87774019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87774013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43887008 + 43887009.

It is an arithmetic number, because the mean of its divisors is an integer number (43887009).

Almost surely, 2^87774017 is an apocalyptic number.

It is an amenable number.

87774017 is a deficient number, since it is larger than the sum of its proper divisors (1).

87774017 is an equidigital number, since it uses as much as digits as its factorization.

87774017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76832, while the sum is 41.

The square root of 87774017 is about 9368.7788425173. The cubic root of 87774017 is about 444.4149480263.

The spelling of 87774017 in words is "eighty-seven million, seven hundred seventy-four thousand, seventeen".