87116947 has 2 divisors, whose sum is σ = 87116948. Its totient is φ = 87116946.

The previous prime is 87116941. The next prime is 87116969. The reversal of 87116947 is 74961178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87116947 - 2²³ = 78728339 is a prime.

It is not a weakly prime, because it can be changed into another prime (87116941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43558473 + 43558474.

It is an arithmetic number, because the mean of its divisors is an integer number (43558474).

Almost surely, 2^87116947 is an apocalyptic number.

87116947 is a deficient number, since it is larger than the sum of its proper divisors (1).

87116947 is an equidigital number, since it uses as much as digits as its factorization.

87116947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 87116947 is about 9333.6459650021. The cubic root of 87116947 is about 443.3032164641.

The spelling of 87116947 in words is "eighty-seven million, one hundred sixteen thousand, nine hundred forty-seven".