87816877 has 2 divisors, whose sum is σ = 87816878. Its totient is φ = 87816876.

The previous prime is 87816871. The next prime is 87816889. The reversal of 87816877 is 77861878.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56836521 + 30980356 = 7539^2 + 5566^2 .

It is a cyclic number.

It is not a de Polignac number, because 87816877 - 2⁷ = 87816749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87816871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43908438 + 43908439.

It is an arithmetic number, because the mean of its divisors is an integer number (43908439).

Almost surely, 2^87816877 is an apocalyptic number.

It is an amenable number.

87816877 is a deficient number, since it is larger than the sum of its proper divisors (1).

87816877 is an equidigital number, since it uses as much as digits as its factorization.

87816877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1053696, while the sum is 52.

The square root of 87816877 is about 9371.0659479058. The cubic root of 87816877 is about 444.4872721067.

The spelling of 87816877 in words is "eighty-seven million, eight hundred sixteen thousand, eight hundred seventy-seven".