10109978 has 4 divisors (see below), whose sum is σ = 15164970. Its totient is φ = 5054988.

The previous prime is 10109969. The next prime is 10109993. The reversal of 10109978 is 87990101.

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

It can be written as a sum of positive squares in only one way, i.e., 10029889 + 80089 = 3167^2 + 283^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2527493 + ... + 2527496.

Almost surely, 2^10109978 is an apocalyptic number.

10109978 is a deficient number, since it is larger than the sum of its proper divisors (5054992).

10109978 is an equidigital number, since it uses as much as digits as its factorization.

10109978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5054991.

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

The square root of 10109978 is about 3179.6191595850. The cubic root of 10109978 is about 216.2303926001.

The spelling of 10109978 in words is "ten million, one hundred nine thousand, nine hundred seventy-eight".