123921047 has 2 divisors, whose sum is σ = 123921048. Its totient is φ = 123921046.

The previous prime is 123921023. The next prime is 123921053. The reversal of 123921047 is 740129321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123921047 - 2¹⁴ = 123904663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123921067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61960523 + 61960524.

It is an arithmetic number, because the mean of its divisors is an integer number (61960524).

Almost surely, 2^123921047 is an apocalyptic number.

123921047 is a deficient number, since it is larger than the sum of its proper divisors (1).

123921047 is an equidigital number, since it uses as much as digits as its factorization.

123921047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 123921047 is about 11131.9830668215. The cubic root of 123921047 is about 498.5572368734.

The spelling of 123921047 in words is "one hundred twenty-three million, nine hundred twenty-one thousand, forty-seven".