123577913 has 4 divisors (see below), whose sum is σ = 130847220. Its totient is φ = 116308608.

The previous prime is 123577907. The next prime is 123577939. The reversal of 123577913 is 319775321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55234624 + 68343289 = 7432^2 + 8267^2 .

It is a cyclic number.

It is not a de Polignac number, because 123577913 - 2¹⁸ = 123315769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123577963) 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, 3634628 + ... + 3634661.

It is an arithmetic number, because the mean of its divisors is an integer number (32711805).

Almost surely, 2^123577913 is an apocalyptic number.

It is an amenable number.

123577913 is a deficient number, since it is larger than the sum of its proper divisors (7269307).

123577913 is an equidigital number, since it uses as much as digits as its factorization.

123577913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269306.

The product of its digits is 39690, while the sum is 38.

The square root of 123577913 is about 11116.5603043387. The cubic root of 123577913 is about 498.0966476938.

The spelling of 123577913 in words is "one hundred twenty-three million, five hundred seventy-seven thousand, nine hundred thirteen".