513700123 has 8 divisors (see below), whose sum is σ = 521445600. Its totient is φ = 505968960.

The previous prime is 513700091. The next prime is 513700129. The reversal of 513700123 is 321007315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 513700123 - 2⁵ = 513700091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513700094 and 513700103.

It is not an unprimeable number, because it can be changed into a prime (513700129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84903 + ... + 90751.

It is an arithmetic number, because the mean of its divisors is an integer number (65180700).

Almost surely, 2^513700123 is an apocalyptic number.

513700123 is a deficient number, since it is larger than the sum of its proper divisors (7745477).

513700123 is a wasteful number, since it uses less digits than its factorization.

513700123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7157.

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

The square root of 513700123 is about 22664.9536288959. The cubic root of 513700123 is about 800.8845024381.

Adding to 513700123 its reverse (321007315), we get a palindrome (834707438).

The spelling of 513700123 in words is "five hundred thirteen million, seven hundred thousand, one hundred twenty-three".