116865905 has 16 divisors (see below), whose sum is σ = 159912144. Its totient is φ = 81223680.

The previous prime is 116865899. The next prime is 116865907. The reversal of 116865905 is 509568611.

It can be written as a sum of positive squares in 8 ways, for example, as 21939856 + 94926049 = 4684^2 + 9743^2 .

It is not a de Polignac number, because 116865905 - 2⁸ = 116865649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116865907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51776 + ... + 53985.

It is an arithmetic number, because the mean of its divisors is an integer number (9994509).

Almost surely, 2^116865905 is an apocalyptic number.

It is an amenable number.

116865905 is a deficient number, since it is larger than the sum of its proper divisors (43046239).

116865905 is a wasteful number, since it uses less digits than its factorization.

116865905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105796.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 116865905 is about 10810.4535057508. The cubic root of 116865905 is about 488.9103999278.

The spelling of 116865905 in words is "one hundred sixteen million, eight hundred sixty-five thousand, nine hundred five".