516393949 has 4 divisors (see below), whose sum is σ = 517882464. Its totient is φ = 514905436.

The previous prime is 516393937. The next prime is 516393959. The reversal of 516393949 is 949393615.

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 516393949 - 2²³ = 508005341 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516393929) 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, 743737 + ... + 744430.

It is an arithmetic number, because the mean of its divisors is an integer number (129470616).

Almost surely, 2^516393949 is an apocalyptic number.

It is an amenable number.

516393949 is a deficient number, since it is larger than the sum of its proper divisors (1488515).

516393949 is a wasteful number, since it uses less digits than its factorization.

516393949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488514.

The product of its digits is 787320, while the sum is 49.

The square root of 516393949 is about 22724.3030476184. The cubic root of 516393949 is about 802.2819995126.

The spelling of 516393949 in words is "five hundred sixteen million, three hundred ninety-three thousand, nine hundred forty-nine".