87775057 has 2 divisors, whose sum is σ = 87775058. Its totient is φ = 87775056.

The previous prime is 87775027. The next prime is 87775069. The reversal of 87775057 is 75057778.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85082176 + 2692881 = 9224^2 + 1641^2 .

It is a cyclic number.

It is not a de Polignac number, because 87775057 - 2¹⁵ = 87742289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87774998 and 87775016.

It is not a weakly prime, because it can be changed into another prime (87775007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43887528 + 43887529.

It is an arithmetic number, because the mean of its divisors is an integer number (43887529).

Almost surely, 2^87775057 is an apocalyptic number.

It is an amenable number.

87775057 is a deficient number, since it is larger than the sum of its proper divisors (1).

87775057 is an equidigital number, since it uses as much as digits as its factorization.

87775057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480200, while the sum is 46.

The square root of 87775057 is about 9368.8343458511. The cubic root of 87775057 is about 444.4167032523.

The spelling of 87775057 in words is "eighty-seven million, seven hundred seventy-five thousand, fifty-seven".