123778367 has 2 divisors, whose sum is σ = 123778368. Its totient is φ = 123778366.

The previous prime is 123778337. The next prime is 123778379. The reversal of 123778367 is 763877321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123778367 - 2¹⁸ = 123516223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123778327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61889183 + 61889184.

It is an arithmetic number, because the mean of its divisors is an integer number (61889184).

Almost surely, 2^123778367 is an apocalyptic number.

123778367 is a deficient number, since it is larger than the sum of its proper divisors (1).

123778367 is an equidigital number, since it uses as much as digits as its factorization.

123778367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 44.

The square root of 123778367 is about 11125.5726594185. The cubic root of 123778367 is about 498.3658207351.

The spelling of 123778367 in words is "one hundred twenty-three million, seven hundred seventy-eight thousand, three hundred sixty-seven".