519459421 has 4 divisors (see below), whose sum is σ = 559417852. Its totient is φ = 479500992.

The previous prime is 519459419. The next prime is 519459431. The reversal of 519459421 is 124954915.

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

It can be written as a sum of positive squares in 2 ways, for example, as 147355321 + 372104100 = 12139^2 + 19290^2 .

It is a cyclic number.

It is not a de Polignac number, because 519459421 - 2¹ = 519459419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (519459431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19979196 + ... + 19979221.

It is an arithmetic number, because the mean of its divisors is an integer number (139854463).

Almost surely, 2^519459421 is an apocalyptic number.

It is an amenable number.

519459421 is a deficient number, since it is larger than the sum of its proper divisors (39958431).

519459421 is a wasteful number, since it uses less digits than its factorization.

519459421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39958430.

The product of its digits is 64800, while the sum is 40.

The square root of 519459421 is about 22791.6524411900. The cubic root of 519459421 is about 803.8663987019.

The spelling of 519459421 in words is "five hundred nineteen million, four hundred fifty-nine thousand, four hundred twenty-one".