86391967 has 2 divisors, whose sum is σ = 86391968. Its totient is φ = 86391966.

The previous prime is 86391937. The next prime is 86391997. The reversal of 86391967 is 76919368.

It is a balanced prime because it is at equal distance from previous prime (86391937) and next prime (86391997).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86391967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86391967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86391937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43195983 + 43195984.

It is an arithmetic number, because the mean of its divisors is an integer number (43195984).

Almost surely, 2^86391967 is an apocalyptic number.

86391967 is a deficient number, since it is larger than the sum of its proper divisors (1).

86391967 is an equidigital number, since it uses as much as digits as its factorization.

86391967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 86391967 is about 9294.7279142533. The cubic root of 86391967 is about 442.0700785673.

The spelling of 86391967 in words is "eighty-six million, three hundred ninety-one thousand, nine hundred sixty-seven".