123957243 has 8 divisors (see below), whose sum is σ = 183640400. Its totient is φ = 82638144.

The previous prime is 123957203. The next prime is 123957257. The reversal of 123957243 is 342759321.

123957243 is a `hidden beast` number, since 12 + 39 + 572 + 43 = 666.

It is not a de Polignac number, because 123957243 - 2¹⁶ = 123891707 is a prime.

It is a super-2 number, since 2×123957243² = 30730796184322098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123957198 and 123957207.

It is not an unprimeable number, because it can be changed into a prime (123957203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2295478 + ... + 2295531.

It is an arithmetic number, because the mean of its divisors is an integer number (22955050).

Almost surely, 2^123957243 is an apocalyptic number.

123957243 is a deficient number, since it is larger than the sum of its proper divisors (59683157).

123957243 is an equidigital number, since it uses as much as digits as its factorization.

123957243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591018 (or 4591012 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 123957243 is about 11133.6087141591. The cubic root of 123957243 is about 498.6057732102.

The spelling of 123957243 in words is "one hundred twenty-three million, nine hundred fifty-seven thousand, two hundred forty-three".