87566047 has 2 divisors, whose sum is σ = 87566048. Its totient is φ = 87566046.

The previous prime is 87565999. The next prime is 87566057. The reversal of 87566047 is 74066578.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87566047 - 2¹⁵ = 87533279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87565994 and 87566012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87566057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43783023 + 43783024.

It is an arithmetic number, because the mean of its divisors is an integer number (43783024).

Almost surely, 2^87566047 is an apocalyptic number.

87566047 is a deficient number, since it is larger than the sum of its proper divisors (1).

87566047 is an equidigital number, since it uses as much as digits as its factorization.

87566047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 87566047 is about 9357.6731616359. The cubic root of 87566047 is about 444.0636744840.

The spelling of 87566047 in words is "eighty-seven million, five hundred sixty-six thousand, forty-seven".