123730917 has 4 divisors (see below), whose sum is σ = 164974560. Its totient is φ = 82487276.

The previous prime is 123730903. The next prime is 123730939. The reversal of 123730917 is 719037321.

It is a happy number.

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 123730917 - 2¹⁵ = 123698149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123730967) 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, 20621817 + ... + 20621822.

It is an arithmetic number, because the mean of its divisors is an integer number (41243640).

Almost surely, 2^123730917 is an apocalyptic number.

It is an amenable number.

123730917 is a deficient number, since it is larger than the sum of its proper divisors (41243643).

123730917 is an equidigital number, since it uses as much as digits as its factorization.

123730917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41243642.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 123730917 is about 11123.4399805096. The cubic root of 123730917 is about 498.3021303366.

The spelling of 123730917 in words is "one hundred twenty-three million, seven hundred thirty thousand, nine hundred seventeen".