86744849 has 4 divisors (see below), whose sum is σ = 87587136. Its totient is φ = 85902564.

The previous prime is 86744821. The next prime is 86744873. The reversal of 86744849 is 94844768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86744849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 86744797 and 86744806.

It is not an unprimeable number, because it can be changed into a prime (86734849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420989 + ... + 421194.

It is an arithmetic number, because the mean of its divisors is an integer number (21896784).

Almost surely, 2^86744849 is an apocalyptic number.

It is an amenable number.

86744849 is a deficient number, since it is larger than the sum of its proper divisors (842287).

86744849 is a wasteful number, since it uses less digits than its factorization.

86744849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842286.

The product of its digits is 1548288, while the sum is 50.

The square root of 86744849 is about 9313.6914808254. The cubic root of 86744849 is about 442.6711632093.

The spelling of 86744849 in words is "eighty-six million, seven hundred forty-four thousand, eight hundred forty-nine".