519988961 has 4 divisors (see below), whose sum is σ = 520396800. Its totient is φ = 519581124.

The previous prime is 519988957. The next prime is 519988993. The reversal of 519988961 is 169889915.

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 519988961 - 2² = 519988957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 519988897 and 519988906.

It is not an unprimeable number, because it can be changed into a prime (519988901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202001 + ... + 204558.

It is an arithmetic number, because the mean of its divisors is an integer number (130099200).

Almost surely, 2^519988961 is an apocalyptic number.

It is an amenable number.

519988961 is a deficient number, since it is larger than the sum of its proper divisors (407839).

519988961 is a wasteful number, since it uses less digits than its factorization.

519988961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407838.

The product of its digits is 1399680, while the sum is 56.

The square root of 519988961 is about 22803.2664546113. The cubic root of 519988961 is about 804.1394613196.

The spelling of 519988961 in words is "five hundred nineteen million, nine hundred eighty-eight thousand, nine hundred sixty-one".