123720833 has 2 divisors, whose sum is σ = 123720834. Its totient is φ = 123720832.

The previous prime is 123720827. The next prime is 123720853. The reversal of 123720833 is 338027321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121727089 + 1993744 = 11033^2 + 1412^2 .

It is a cyclic number.

It is not a de Polignac number, because 123720833 - 2²⁶ = 56611969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123720796 and 123720805.

It is not a weakly prime, because it can be changed into another prime (123720853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61860416 + 61860417.

It is an arithmetic number, because the mean of its divisors is an integer number (61860417).

Almost surely, 2^123720833 is an apocalyptic number.

It is an amenable number.

123720833 is a deficient number, since it is larger than the sum of its proper divisors (1).

123720833 is an equidigital number, since it uses as much as digits as its factorization.

123720833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 123720833 is about 11122.9866942292. The cubic root of 123720833 is about 498.2885928546.

The spelling of 123720833 in words is "one hundred twenty-three million, seven hundred twenty thousand, eight hundred thirty-three".