116864813 has 4 divisors (see below), whose sum is σ = 125854428. Its totient is φ = 107875200.

The previous prime is 116864807. The next prime is 116864819. The reversal of 116864813 is 318468611.

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

It is an interprime number because it is at equal distance from previous prime (116864807) and next prime (116864819).

It can be written as a sum of positive squares in 2 ways, for example, as 7912969 + 108951844 = 2813^2 + 10438^2 .

It is a cyclic number.

It is not a de Polignac number, because 116864813 - 2⁸ = 116864557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116864819) 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, 4494788 + ... + 4494813.

It is an arithmetic number, because the mean of its divisors is an integer number (31463607).

Almost surely, 2^116864813 is an apocalyptic number.

116864813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

116864813 is a deficient number, since it is larger than the sum of its proper divisors (8989615).

116864813 is an equidigital number, since it uses as much as digits as its factorization.

116864813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8989614.

The product of its digits is 27648, while the sum is 38.

The square root of 116864813 is about 10810.4029989635. The cubic root of 116864813 is about 488.9088771232.

The spelling of 116864813 in words is "one hundred sixteen million, eight hundred sixty-four thousand, eight hundred thirteen".