123013237 has 2 divisors, whose sum is σ = 123013238. Its totient is φ = 123013236.

The previous prime is 123013217. The next prime is 123013279. The reversal of 123013237 is 732310321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122788561 + 224676 = 11081^2 + 474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123013237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123013217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506618 + 61506619.

It is an arithmetic number, because the mean of its divisors is an integer number (61506619).

Almost surely, 2^123013237 is an apocalyptic number.

It is an amenable number.

123013237 is a deficient number, since it is larger than the sum of its proper divisors (1).

123013237 is an equidigital number, since it uses as much as digits as its factorization.

123013237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 123013237 is about 11091.1332604022. The cubic root of 123013237 is about 497.3368228262.

Adding to 123013237 its reverse (732310321), we get a palindrome (855323558).

The spelling of 123013237 in words is "one hundred twenty-three million, thirteen thousand, two hundred thirty-seven".