77919401 has 8 divisors (see below), whose sum is σ = 89649600. Its totient is φ = 66338928.

The previous prime is 77919367. The next prime is 77919403. The reversal of 77919401 is 10491977.

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

It is a cyclic number.

It is not a de Polignac number, because 77919401 - 2¹⁰ = 77918377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77919403) 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, 36311 + ... + 38396.

It is an arithmetic number, because the mean of its divisors is an integer number (11206200).

Almost surely, 2^77919401 is an apocalyptic number.

It is an amenable number.

77919401 is a deficient number, since it is larger than the sum of its proper divisors (11730199).

77919401 is a wasteful number, since it uses less digits than its factorization.

77919401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74863.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 77919401 is about 8827.1966671192. The cubic root of 77919401 is about 427.1186499216.

The spelling of 77919401 in words is "seventy-seven million, nine hundred nineteen thousand, four hundred one".