123400379 has 2 divisors, whose sum is σ = 123400380. Its totient is φ = 123400378.

The previous prime is 123400373. The next prime is 123400391. The reversal of 123400379 is 973004321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123400379 - 2⁴ = 123400363 is a prime.

It is not a weakly prime, because it can be changed into another prime (123400373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61700189 + 61700190.

It is an arithmetic number, because the mean of its divisors is an integer number (61700190).

Almost surely, 2^123400379 is an apocalyptic number.

123400379 is a deficient number, since it is larger than the sum of its proper divisors (1).

123400379 is an equidigital number, since it uses as much as digits as its factorization.

123400379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 123400379 is about 11108.5723205100. The cubic root of 123400379 is about 497.8580088515.

The spelling of 123400379 in words is "one hundred twenty-three million, four hundred thousand, three hundred seventy-nine".