123742115137 has 4 divisors (see below), whose sum is σ = 123742853460. Its totient is φ = 123741376816.

The previous prime is 123742115089. The next prime is 123742115179. The reversal of 123742115137 is 731511247321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 14598438976 + 109143676161 = 120824^2 + 330369^2 .

It is a cyclic number.

It is not a de Polignac number, because 123742115137 - 2¹⁵ = 123742082369 is a prime.

It is a super-2 number, since 2×123742115137² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123742115096 and 123742115105.

It is not an unprimeable number, because it can be changed into a prime (123742115197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16623 + ... + 497755.

It is an arithmetic number, because the mean of its divisors is an integer number (30935713365).

Almost surely, 2^123742115137 is an apocalyptic number.

It is an amenable number.

123742115137 is a deficient number, since it is larger than the sum of its proper divisors (738323).

123742115137 is an equidigital number, since it uses as much as digits as its factorization.

123742115137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738322.

The product of its digits is 35280, while the sum is 37.

The spelling of 123742115137 in words is "one hundred twenty-three billion, seven hundred forty-two million, one hundred fifteen thousand, one hundred thirty-seven".