77116217 has 4 divisors (see below), whose sum is σ = 80469120. Its totient is φ = 73763316.

The previous prime is 77116211. The next prime is 77116229. The reversal of 77116217 is 71261177.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71261177 = 13 ⋅5481629.

It is a cyclic number.

It is not a de Polignac number, because 77116217 - 2⁴ = 77116201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77116211) 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 3 ways as a sum of consecutive naturals, for example, 1676417 + ... + 1676462.

It is an arithmetic number, because the mean of its divisors is an integer number (20117280).

Almost surely, 2^77116217 is an apocalyptic number.

It is an amenable number.

77116217 is a deficient number, since it is larger than the sum of its proper divisors (3352903).

77116217 is a wasteful number, since it uses less digits than its factorization.

77116217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352902.

The product of its digits is 4116, while the sum is 32.

The square root of 77116217 is about 8781.5839687382. The cubic root of 77116217 is about 425.6460154593.

The spelling of 77116217 in words is "seventy-seven million, one hundred sixteen thousand, two hundred seventeen".