86394947 has 2 divisors, whose sum is σ = 86394948. Its totient is φ = 86394946.

The previous prime is 86394937. The next prime is 86394961. The reversal of 86394947 is 74949368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86394947 - 2¹² = 86390851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86394895 and 86394904.

It is not a weakly prime, because it can be changed into another prime (86394937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43197473 + 43197474.

It is an arithmetic number, because the mean of its divisors is an integer number (43197474).

Almost surely, 2^86394947 is an apocalyptic number.

86394947 is a deficient number, since it is larger than the sum of its proper divisors (1).

86394947 is an equidigital number, since it uses as much as digits as its factorization.

86394947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 86394947 is about 9294.8882188007. Note that the first 3 decimals coincide. The cubic root of 86394947 is about 442.0751614229.

The spelling of 86394947 in words is "eighty-six million, three hundred ninety-four thousand, nine hundred forty-seven".