87676789 has 2 divisors, whose sum is σ = 87676790. Its totient is φ = 87676788.

The previous prime is 87676783. The next prime is 87676817. The reversal of 87676789 is 98767678.

87676789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83576164 + 4100625 = 9142^2 + 2025^2 .

It is a cyclic number.

It is not a de Polignac number, because 87676789 - 2³ = 87676781 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87676781) 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, 43838394 + 43838395.

It is an arithmetic number, because the mean of its divisors is an integer number (43838395).

Almost surely, 2^87676789 is an apocalyptic number.

It is an amenable number.

87676789 is a deficient number, since it is larger than the sum of its proper divisors (1).

87676789 is an equidigital number, since it uses as much as digits as its factorization.

87676789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 58.

The square root of 87676789 is about 9363.5884681035. The cubic root of 87676789 is about 444.2507933694.

The spelling of 87676789 in words is "eighty-seven million, six hundred seventy-six thousand, seven hundred eighty-nine".