123398248157 has 2 divisors, whose sum is σ = 123398248158. Its totient is φ = 123398248156.

The previous prime is 123398248093. The next prime is 123398248187. The reversal of 123398248157 is 751842893321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64062647236 + 59335600921 = 253106^2 + 243589^2 .

It is a cyclic number.

It is not a de Polignac number, because 123398248157 - 2⁶ = 123398248093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123398248099 and 123398248108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123398248187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61699124078 + 61699124079.

It is an arithmetic number, because the mean of its divisors is an integer number (61699124079).

Almost surely, 2^123398248157 is an apocalyptic number.

It is an amenable number.

123398248157 is a deficient number, since it is larger than the sum of its proper divisors (1).

123398248157 is an equidigital number, since it uses as much as digits as its factorization.

123398248157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The spelling of 123398248157 in words is "one hundred twenty-three billion, three hundred ninety-eight million, two hundred forty-eight thousand, one hundred fifty-seven".