5191239605 has 8 divisors (see below), whose sum is σ = 6230031192. Its totient is φ = 4152629248.

The previous prime is 5191239593. The next prime is 5191239607. The reversal of 5191239605 is 5069321915.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2840250436 + 2350989169 = 53294^2 + 48487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5191239605 - 2⁸ = 5191239349 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 (5191239607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28709 + ... + 105861.

It is an arithmetic number, because the mean of its divisors is an integer number (778753899).

Almost surely, 2^5191239605 is an apocalyptic number.

It is an amenable number.

5191239605 is a deficient number, since it is larger than the sum of its proper divisors (1038791587).

5191239605 is a wasteful number, since it uses less digits than its factorization.

5191239605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90615.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 5191239605 is about 72050.2574943352. The cubic root of 5191239605 is about 1731.5047668098.

The spelling of 5191239605 in words is "five billion, one hundred ninety-one million, two hundred thirty-nine thousand, six hundred five".