86444549 has 2 divisors, whose sum is σ = 86444550. Its totient is φ = 86444548.

The previous prime is 86444459. The next prime is 86444573. The reversal of 86444549 is 94544468.

Together with previous prime (86444459) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 47524 = 9295^2 + 218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86444549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86444599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43222274 + 43222275.

It is an arithmetic number, because the mean of its divisors is an integer number (43222275).

Almost surely, 2^86444549 is an apocalyptic number.

It is an amenable number.

86444549 is a deficient number, since it is larger than the sum of its proper divisors (1).

86444549 is an equidigital number, since it uses as much as digits as its factorization.

86444549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 44.

The square root of 86444549 is about 9297.5560767333. The cubic root of 86444549 is about 442.1597482257.

The spelling of 86444549 in words is "eighty-six million, four hundred forty-four thousand, five hundred forty-nine".