86881945 has 4 divisors (see below), whose sum is σ = 104258340. Its totient is φ = 69505552.

The previous prime is 86881943. The next prime is 86881979. The reversal of 86881945 is 54918868.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61591104 + 25290841 = 7848^2 + 5029^2 .

It is a cyclic number.

It is not a de Polignac number, because 86881945 - 2¹ = 86881943 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (86881943) 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, 8688190 + ... + 8688199.

It is an arithmetic number, because the mean of its divisors is an integer number (26064585).

Almost surely, 2^86881945 is an apocalyptic number.

It is an amenable number.

86881945 is a deficient number, since it is larger than the sum of its proper divisors (17376395).

86881945 is a wasteful number, since it uses less digits than its factorization.

86881945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17376394.

The product of its digits is 552960, while the sum is 49.

The square root of 86881945 is about 9321.0484925249. The cubic root of 86881945 is about 442.9042471822.

The spelling of 86881945 in words is "eighty-six million, eight hundred eighty-one thousand, nine hundred forty-five".