513920969 has 4 divisors (see below), whose sum is σ = 515573760. Its totient is φ = 512268180.

The previous prime is 513920951. The next prime is 513920989. The reversal of 513920969 is 969029315.

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 513920969 - 2²⁴ = 497143753 is a prime.

It is a super-2 number, since 2×513920969² = 528229524755797922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513920929) 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 3 ways as a sum of consecutive naturals, for example, 825929 + ... + 826550.

It is an arithmetic number, because the mean of its divisors is an integer number (128893440).

Almost surely, 2^513920969 is an apocalyptic number.

It is an amenable number.

513920969 is a deficient number, since it is larger than the sum of its proper divisors (1652791).

513920969 is a wasteful number, since it uses less digits than its factorization.

513920969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652790.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 513920969 is about 22669.8250765197. The cubic root of 513920969 is about 800.9992560271. Note that the first 3 decimals are identical.

The spelling of 513920969 in words is "five hundred thirteen million, nine hundred twenty thousand, nine hundred sixty-nine".