86744945 has 36 divisors (see below), whose sum is σ = 125706204. Its totient is φ = 57294720.

The previous prime is 86744921. The next prime is 86745059. The reversal of 86744945 is 54944768.

It can be written as a sum of positive squares in 6 ways, for example, as 13454224 + 73290721 = 3668^2 + 8561^2 .

It is not a de Polignac number, because 86744945 - 2⁸ = 86744689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 86744945.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 205835 + ... + 206255.

It is an arithmetic number, because the mean of its divisors is an integer number (3491839).

Almost surely, 2^86744945 is an apocalyptic number.

It is an amenable number.

86744945 is a deficient number, since it is larger than the sum of its proper divisors (38961259).

86744945 is a wasteful number, since it uses less digits than its factorization.

86744945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 462 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 86744945 is about 9313.6966345270. The cubic root of 86744945 is about 442.6713265097.

The spelling of 86744945 in words is "eighty-six million, seven hundred forty-four thousand, nine hundred forty-five".