123777213 has 8 divisors (see below), whose sum is σ = 188612928. Its totient is φ = 70729824.

The previous prime is 123777197. The next prime is 123777233. The reversal of 123777213 is 312777321.

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

It is not a de Polignac number, because 123777213 - 2⁴ = 123777197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123777233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2947056 + ... + 2947097.

It is an arithmetic number, because the mean of its divisors is an integer number (23576616).

Almost surely, 2^123777213 is an apocalyptic number.

It is an amenable number.

123777213 is a deficient number, since it is larger than the sum of its proper divisors (64835715).

123777213 is an equidigital number, since it uses as much as digits as its factorization.

123777213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894163.

The product of its digits is 12348, while the sum is 33.

The square root of 123777213 is about 11125.5207967987. The cubic root of 123777213 is about 498.3642719563.

The spelling of 123777213 in words is "one hundred twenty-three million, seven hundred seventy-seven thousand, two hundred thirteen".