123603157 has 2 divisors, whose sum is σ = 123603158. Its totient is φ = 123603156.

The previous prime is 123603149. The next prime is 123603187. The reversal of 123603157 is 751306321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122080401 + 1522756 = 11049^2 + 1234^2 .

It is an emirp because it is prime and its reverse (751306321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123603157 - 2³ = 123603149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123603187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61801578 + 61801579.

It is an arithmetic number, because the mean of its divisors is an integer number (61801579).

Almost surely, 2^123603157 is an apocalyptic number.

It is an amenable number.

123603157 is a deficient number, since it is larger than the sum of its proper divisors (1).

123603157 is an equidigital number, since it uses as much as digits as its factorization.

123603157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 123603157 is about 11117.6956695171. The cubic root of 123603157 is about 498.1305617792.

Adding to 123603157 its reverse (751306321), we get a palindrome (874909478).

The spelling of 123603157 in words is "one hundred twenty-three million, six hundred three thousand, one hundred fifty-seven".