9120001978 has 8 divisors (see below), whose sum is σ = 13682014560. Its totient is φ = 4559330460.

The previous prime is 9120001939. The next prime is 9120001991. The reversal of 9120001978 is 8791000219.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318088 + ... + 345571.

It is an arithmetic number, because the mean of its divisors is an integer number (1710251820).

Almost surely, 2^9120001978 is an apocalyptic number.

9120001978 is a deficient number, since it is larger than the sum of its proper divisors (4562012582).

9120001978 is a wasteful number, since it uses less digits than its factorization.

9120001978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670532.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 9120001978 is about 95498.7014466689. The cubic root of 9120001978 is about 2089.2880046904.

The spelling of 9120001978 in words is "nine billion, one hundred twenty million, one thousand, nine hundred seventy-eight".