519139469 has 6 divisors (see below), whose sum is σ = 537167790. Its totient is φ = 501119640.

The previous prime is 519139447. The next prime is 519139471. The reversal of 519139469 is 964931915.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 447534025 + 71605444 = 21155^2 + 8462^2 .

It is a de Polignac number, because none of the positive numbers 2^k-519139469 is a prime.

It is a super-2 number, since 2×519139469² = 539011576547203922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (519139409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120584 + ... + 124814.

It is an arithmetic number, because the mean of its divisors is an integer number (89527965).

Almost surely, 2^519139469 is an apocalyptic number.

It is an amenable number.

519139469 is a deficient number, since it is larger than the sum of its proper divisors (18028321).

519139469 is an frugal number, since it uses more digits than its factorization.

519139469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8491 (or 4260 counting only the distinct ones).

The product of its digits is 262440, while the sum is 47.

The square root of 519139469 is about 22784.6322989861. The cubic root of 519139469 is about 803.7013222940.

The spelling of 519139469 in words is "five hundred nineteen million, one hundred thirty-nine thousand, four hundred sixty-nine".