513123074 has 4 divisors (see below), whose sum is σ = 769684614. Its totient is φ = 256561536.

The previous prime is 513123073. The next prime is 513123089. The reversal of 513123074 is 470321315.

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

It can be written as a sum of positive squares in only one way, i.e., 497067025 + 16056049 = 22295^2 + 4007^2 .

It is not an unprimeable number, because it can be changed into a prime (513123073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128280767 + ... + 128280770.

Almost surely, 2^513123074 is an apocalyptic number.

513123074 is a deficient number, since it is larger than the sum of its proper divisors (256561540).

513123074 is a wasteful number, since it uses less digits than its factorization.

513123074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256561539.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 513123074 is about 22652.2200677991. The cubic root of 513123074 is about 800.5845072101.

Adding to 513123074 its reverse (470321315), we get a palindrome (983444389).

The spelling of 513123074 in words is "five hundred thirteen million, one hundred twenty-three thousand, seventy-four".