516945403 has 4 divisors (see below), whose sum is σ = 556710448. Its totient is φ = 477180360.

The previous prime is 516945397. The next prime is 516945409. The reversal of 516945403 is 304549615.

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

It is an interprime number because it is at equal distance from previous prime (516945397) and next prime (516945409).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516945403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516945409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19882503 + ... + 19882528.

It is an arithmetic number, because the mean of its divisors is an integer number (139177612).

Almost surely, 2^516945403 is an apocalyptic number.

516945403 is a deficient number, since it is larger than the sum of its proper divisors (39765045).

516945403 is a wasteful number, since it uses less digits than its factorization.

516945403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39765044.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 516945403 is about 22736.4333834487. The cubic root of 516945403 is about 802.5674819597.

The spelling of 516945403 in words is "five hundred sixteen million, nine hundred forty-five thousand, four hundred three".