5191397719 has 4 divisors (see below), whose sum is σ = 5191555120. Its totient is φ = 5191240320.

The previous prime is 5191397707. The next prime is 5191397723. The reversal of 5191397719 is 9177931915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9177931915 = 5 ⋅1835586383.

It is a cyclic number.

It is not a de Polignac number, because 5191397719 - 2¹⁹ = 5190873431 is a prime.

It is a super-2 number, since 2×5191397719² = 53901220553676805922, 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 (5191397779) 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, 8139 + ... + 102220.

It is an arithmetic number, because the mean of its divisors is an integer number (1297888780).

Almost surely, 2^5191397719 is an apocalyptic number.

5191397719 is a deficient number, since it is larger than the sum of its proper divisors (157401).

5191397719 is a wasteful number, since it uses less digits than its factorization.

5191397719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157400.

The product of its digits is 535815, while the sum is 52.

The square root of 5191397719 is about 72051.3547339674. The cubic root of 5191397719 is about 1731.5223459358.

The spelling of 5191397719 in words is "five billion, one hundred ninety-one million, three hundred ninety-seven thousand, seven hundred nineteen".