109978813 has 8 divisors (see below), whose sum is σ = 127103040. Its totient is φ = 93207840.

The previous prime is 109978789. The next prime is 109978819. The reversal of 109978813 is 318879901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109978813 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 (109978819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87643 + ... + 88888.

It is an arithmetic number, because the mean of its divisors is an integer number (15887880).

Almost surely, 2^109978813 is an apocalyptic number.

It is an amenable number.

109978813 is a deficient number, since it is larger than the sum of its proper divisors (17124227).

109978813 is an equidigital number, since it uses as much as digits as its factorization.

109978813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176627.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 109978813 is about 10487.0783824667. The cubic root of 109978813 is about 479.1112213636. Note that the first 3 decimals are identical.

The spelling of 109978813 in words is "one hundred nine million, nine hundred seventy-eight thousand, eight hundred thirteen".