77798369 has 8 divisors (see below), whose sum is σ = 89338080. Its totient is φ = 67003200.

The previous prime is 77798359. The next prime is 77798389. The reversal of 77798369 is 96389777.

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

It is not a de Polignac number, because 77798369 - 2¹⁶ = 77732833 is a prime.

It is a super-2 number, since 2×77798369² = 12105172438120322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77798339) 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, 185912 + ... + 186329.

It is an arithmetic number, because the mean of its divisors is an integer number (11167260).

Almost surely, 2^77798369 is an apocalyptic number.

It is an amenable number.

77798369 is a deficient number, since it is larger than the sum of its proper divisors (11539711).

77798369 is a wasteful number, since it uses less digits than its factorization.

77798369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372271.

The product of its digits is 4000752, while the sum is 56.

The square root of 77798369 is about 8820.3383721941. The cubic root of 77798369 is about 426.8973878961.

The spelling of 77798369 in words is "seventy-seven million, seven hundred ninety-eight thousand, three hundred sixty-nine".