123020939 has 2 divisors, whose sum is σ = 123020940. Its totient is φ = 123020938.

The previous prime is 123020923. The next prime is 123020941. The reversal of 123020939 is 939020321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123020939 - 2⁴ = 123020923 is a prime.

Together with 123020941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123020239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510469 + 61510470.

It is an arithmetic number, because the mean of its divisors is an integer number (61510470).

Almost surely, 2^123020939 is an apocalyptic number.

123020939 is a deficient number, since it is larger than the sum of its proper divisors (1).

123020939 is an equidigital number, since it uses as much as digits as its factorization.

123020939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 123020939 is about 11091.4804692611. The cubic root of 123020939 is about 497.3472022194.

The spelling of 123020939 in words is "one hundred twenty-three million, twenty thousand, nine hundred thirty-nine".