123347157 has 4 divisors (see below), whose sum is σ = 164462880. Its totient is φ = 82231436.

The previous prime is 123347149. The next prime is 123347167. The reversal of 123347157 is 751743321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123347157 - 2³ = 123347149 is a prime.

It is a super-2 number, since 2×123347157² = 30429042279965298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123347167) 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 in 3 ways as a sum of consecutive naturals, for example, 20557857 + ... + 20557862.

It is an arithmetic number, because the mean of its divisors is an integer number (41115720).

Almost surely, 2^123347157 is an apocalyptic number.

It is an amenable number.

123347157 is a deficient number, since it is larger than the sum of its proper divisors (41115723).

123347157 is an equidigital number, since it uses as much as digits as its factorization.

123347157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41115722.

The product of its digits is 17640, while the sum is 33.

The square root of 123347157 is about 11106.1765247992. The cubic root of 123347157 is about 497.7864239573.

It can be divided in two parts, 12334 and 7157, that added together give a palindrome (19491).

The spelling of 123347157 in words is "one hundred twenty-three million, three hundred forty-seven thousand, one hundred fifty-seven".