123157871 has 2 divisors, whose sum is σ = 123157872. Its totient is φ = 123157870.

The previous prime is 123157861. The next prime is 123157897. The reversal of 123157871 is 178751321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123157871 is a prime.

It is a super-2 number, since 2×123157871² = 30335722378505282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123157831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61578935 + 61578936.

It is an arithmetic number, because the mean of its divisors is an integer number (61578936).

Almost surely, 2^123157871 is an apocalyptic number.

123157871 is a deficient number, since it is larger than the sum of its proper divisors (1).

123157871 is an equidigital number, since it uses as much as digits as its factorization.

123157871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 35.

The square root of 123157871 is about 11097.6515984239. The cubic root of 123157871 is about 497.5316626734.

The spelling of 123157871 in words is "one hundred twenty-three million, one hundred fifty-seven thousand, eight hundred seventy-one".