123730105 has 4 divisors (see below), whose sum is σ = 148476132. Its totient is φ = 98984080.

The previous prime is 123730099. The next prime is 123730111. The reversal of 123730105 is 501037321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501037321 = 29 ⋅17277149.

It is an interprime number because it is at equal distance from previous prime (123730099) and next prime (123730111).

It can be written as a sum of positive squares in 2 ways, for example, as 79281216 + 44448889 = 8904^2 + 6667^2 .

It is not a de Polignac number, because 123730105 - 2⁵ = 123730073 is a prime.

It is a super-2 number, since 2×123730105² = 30618277766622050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 12373006 + ... + 12373015.

It is an arithmetic number, because the mean of its divisors is an integer number (37119033).

Almost surely, 2^123730105 is an apocalyptic number.

It is an amenable number.

123730105 is a deficient number, since it is larger than the sum of its proper divisors (24746027).

123730105 is an equidigital number, since it uses as much as digits as its factorization.

123730105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24746026.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 123730105 is about 11123.4034809495. The cubic root of 123730105 is about 498.3010402770.

Adding to 123730105 its reverse (501037321), we get a palindrome (624767426).

The spelling of 123730105 in words is "one hundred twenty-three million, seven hundred thirty thousand, one hundred five".