86117947 has 2 divisors, whose sum is σ = 86117948. Its totient is φ = 86117946.

The previous prime is 86117893. The next prime is 86118001. The reversal of 86117947 is 74971168.

It is a balanced prime because it is at equal distance from previous prime (86117893) and next prime (86118001).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86117947 is a prime.

It is not a weakly prime, because it can be changed into another prime (86117047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43058973 + 43058974.

It is an arithmetic number, because the mean of its divisors is an integer number (43058974).

Almost surely, 2^86117947 is an apocalyptic number.

86117947 is a deficient number, since it is larger than the sum of its proper divisors (1).

86117947 is an equidigital number, since it uses as much as digits as its factorization.

86117947 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 86117947 is about 9279.9755926403. The cubic root of 86117947 is about 441.6021942361.

The spelling of 86117947 in words is "eighty-six million, one hundred seventeen thousand, nine hundred forty-seven".