123734665 has 4 divisors (see below), whose sum is σ = 148481604. Its totient is φ = 98987728.

The previous prime is 123734659. The next prime is 123734711. The reversal of 123734665 is 566437321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566437321 = 331 ⋅1711291.

It can be written as a sum of positive squares in 2 ways, for example, as 15657849 + 108076816 = 3957^2 + 10396^2 .

It is a cyclic number.

It is not a de Polignac number, because 123734665 - 2⁷ = 123734537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12373462 + ... + 12373471.

It is an arithmetic number, because the mean of its divisors is an integer number (37120401).

Almost surely, 2^123734665 is an apocalyptic number.

It is an amenable number.

123734665 is a deficient number, since it is larger than the sum of its proper divisors (24746939).

123734665 is an equidigital number, since it uses as much as digits as its factorization.

123734665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24746938.

The product of its digits is 90720, while the sum is 37.

The square root of 123734665 is about 11123.6084522964. The cubic root of 123734665 is about 498.3071617321.

The spelling of 123734665 in words is "one hundred twenty-three million, seven hundred thirty-four thousand, six hundred sixty-five".