86161947947 has 2 divisors, whose sum is σ = 86161947948. Its totient is φ = 86161947946.

The previous prime is 86161947929. The next prime is 86161947979. The reversal of 86161947947 is 74974916168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86161947947 - 2¹² = 86161943851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86161947947.

It is not a weakly prime, because it can be changed into another prime (86161943947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43080973973 + 43080973974.

It is an arithmetic number, because the mean of its divisors is an integer number (43080973974).

Almost surely, 2^86161947947 is an apocalyptic number.

86161947947 is a deficient number, since it is larger than the sum of its proper divisors (1).

86161947947 is an equidigital number, since it uses as much as digits as its factorization.

86161947947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 62.

The spelling of 86161947947 in words is "eighty-six billion, one hundred sixty-one million, nine hundred forty-seven thousand, nine hundred forty-seven".