77115223 has 4 divisors (see below), whose sum is σ = 77132808. Its totient is φ = 77097640.

The previous prime is 77115209. The next prime is 77115257. The reversal of 77115223 is 32251177.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32251177 = 7 ⋅4607311.

It is a cyclic number.

It is not a de Polignac number, because 77115223 - 2¹³ = 77107031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77115191 and 77115200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77115323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3753 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (19283202).

Almost surely, 2^77115223 is an apocalyptic number.

77115223 is a deficient number, since it is larger than the sum of its proper divisors (17585).

77115223 is an equidigital number, since it uses as much as digits as its factorization.

77115223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17584.

The product of its digits is 2940, while the sum is 28.

The square root of 77115223 is about 8781.5273728435. The cubic root of 77115223 is about 425.6441866440.

The spelling of 77115223 in words is "seventy-seven million, one hundred fifteen thousand, two hundred twenty-three".