123247057 has 2 divisors, whose sum is σ = 123247058. Its totient is φ = 123247056.

The previous prime is 123247043. The next prime is 123247067. The reversal of 123247057 is 750742321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89094721 + 34152336 = 9439^2 + 5844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123247057 is a prime.

It is a super-2 number, since 2×123247057² = 30379674118322498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123247067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61623528 + 61623529.

It is an arithmetic number, because the mean of its divisors is an integer number (61623529).

Almost surely, 2^123247057 is an apocalyptic number.

It is an amenable number.

123247057 is a deficient number, since it is larger than the sum of its proper divisors (1).

123247057 is an equidigital number, since it uses as much as digits as its factorization.

123247057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 123247057 is about 11101.6691087422. The cubic root of 123247057 is about 497.6517311996.

Adding to 123247057 its reverse (750742321), we get a palindrome (873989378).

The spelling of 123247057 in words is "one hundred twenty-three million, two hundred forty-seven thousand, fifty-seven".