100109978 has 8 divisors (see below), whose sum is σ = 150208020. Its totient is φ = 50040640.

The previous prime is 100109941. The next prime is 100109983. The reversal of 100109978 is 879901001.

It can be written as a sum of positive squares in 2 ways, for example, as 96373489 + 3736489 = 9817^2 + 1933^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7778 + ... + 16146.

Almost surely, 2^100109978 is an apocalyptic number.

100109978 is a deficient number, since it is larger than the sum of its proper divisors (50098042).

100109978 is an equidigital number, since it uses as much as digits as its factorization.

100109978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14352.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 100109978 is about 10005.4973889357. The cubic root of 100109978 is about 464.3289785730.

The spelling of 100109978 in words is "one hundred million, one hundred nine thousand, nine hundred seventy-eight".