112780813 has 4 divisors (see below), whose sum is σ = 112964220. Its totient is φ = 112597408.

The previous prime is 112780807. The next prime is 112780817. The reversal of 112780813 is 318087211.

It is a happy number.

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 17952169 + 94828644 = 4237^2 + 9738^2 .

It is a cyclic number.

It is not a de Polignac number, because 112780813 - 2⁹ = 112780301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112780817) 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, 90778 + ... + 92011.

It is an arithmetic number, because the mean of its divisors is an integer number (28241055).

Almost surely, 2^112780813 is an apocalyptic number.

It is an amenable number.

112780813 is a deficient number, since it is larger than the sum of its proper divisors (183407).

112780813 is an equidigital number, since it uses as much as digits as its factorization.

112780813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183406.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 112780813 is about 10619.8311191845. The cubic root of 112780813 is about 483.1460207457.

The spelling of 112780813 in words is "one hundred twelve million, seven hundred eighty thousand, eight hundred thirteen".