78978201 has 8 divisors (see below), whose sum is σ = 105893280. Its totient is φ = 52357632.

The previous prime is 78978191. The next prime is 78978217. The reversal of 78978201 is 10287987.

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

It is not a de Polignac number, because 78978201 - 2¹⁰ = 78977177 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78978101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73000 + ... + 74073.

It is an arithmetic number, because the mean of its divisors is an integer number (13236660).

Almost surely, 2^78978201 is an apocalyptic number.

It is an amenable number.

78978201 is a deficient number, since it is larger than the sum of its proper divisors (26915079).

78978201 is a wasteful number, since it uses less digits than its factorization.

78978201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147255.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 78978201 is about 8886.9680431517. The cubic root of 78978201 is about 429.0445723924.

The spelling of 78978201 in words is "seventy-eight million, nine hundred seventy-eight thousand, two hundred one".