123139733 has 2 divisors, whose sum is σ = 123139734. Its totient is φ = 123139732.

The previous prime is 123139699. The next prime is 123139739. The reversal of 123139733 is 337931321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92025649 + 31114084 = 9593^2 + 5578^2 .

It is a cyclic number.

It is not a de Polignac number, because 123139733 - 2⁶ = 123139669 is a prime.

It is a super-2 number, since 2×123139733² = 30326787686622578, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123139733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123139739) 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, 61569866 + 61569867.

It is an arithmetic number, because the mean of its divisors is an integer number (61569867).

Almost surely, 2^123139733 is an apocalyptic number.

It is an amenable number.

123139733 is a deficient number, since it is larger than the sum of its proper divisors (1).

123139733 is an equidigital number, since it uses as much as digits as its factorization.

123139733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 32.

The square root of 123139733 is about 11096.8343684134. The cubic root of 123139733 is about 497.5072369174.

The spelling of 123139733 in words is "one hundred twenty-three million, one hundred thirty-nine thousand, seven hundred thirty-three".