1000109978 has 16 divisors (see below), whose sum is σ = 1714884864. Its totient is φ = 428515920.

The previous prime is 1000109977. The next prime is 1000109987. The reversal of 1000109978 is 8799010001.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1000109977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96383 + ... + 106253.

It is an arithmetic number, because the mean of its divisors is an integer number (107180304).

Almost surely, 2^1000109978 is an apocalyptic number.

1000109978 is a deficient number, since it is larger than the sum of its proper divisors (714774886).

1000109978 is an equidigital number, since it uses as much as digits as its factorization.

1000109978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17117.

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

The square root of 1000109978 is about 31624.5154587387. The cubic root of 1000109978 is about 1000.0366579895.

Adding to 1000109978 its reverse (8799010001), we get a palindrome (9799119979).

The spelling of 1000109978 in words is "one billion, one hundred nine thousand, nine hundred seventy-eight".