87078073 has 2 divisors, whose sum is σ = 87078074. Its totient is φ = 87078072.

The previous prime is 87078067. The next prime is 87078077. The reversal of 87078073 is 37087078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55234624 + 31843449 = 7432^2 + 5643^2 .

It is a cyclic number.

It is not a de Polignac number, because 87078073 - 2¹⁷ = 86947001 is a prime.

It is not a weakly prime, because it can be changed into another prime (87078077) 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, 43539036 + 43539037.

It is an arithmetic number, because the mean of its divisors is an integer number (43539037).

Almost surely, 2^87078073 is an apocalyptic number.

It is an amenable number.

87078073 is a deficient number, since it is larger than the sum of its proper divisors (1).

87078073 is an equidigital number, since it uses as much as digits as its factorization.

87078073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 87078073 is about 9331.5632666772. The cubic root of 87078073 is about 443.2372685869.

The spelling of 87078073 in words is "eighty-seven million, seventy-eight thousand, seventy-three".