86441939 has 2 divisors, whose sum is σ = 86441940. Its totient is φ = 86441938.

The previous prime is 86441921. The next prime is 86441959. The reversal of 86441939 is 93914468.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86441939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86441939.

It is not a weakly prime, because it can be changed into another prime (86441909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43220969 + 43220970.

It is an arithmetic number, because the mean of its divisors is an integer number (43220970).

Almost surely, 2^86441939 is an apocalyptic number.

86441939 is a deficient number, since it is larger than the sum of its proper divisors (1).

86441939 is an equidigital number, since it uses as much as digits as its factorization.

86441939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 86441939 is about 9297.4157162085. The cubic root of 86441939 is about 442.1552981723.

The spelling of 86441939 in words is "eighty-six million, four hundred forty-one thousand, nine hundred thirty-nine".