716520019 has 4 divisors (see below), whose sum is σ = 739633600. Its totient is φ = 693406440.

The previous prime is 716520017. The next prime is 716520067. The reversal of 716520019 is 910025617.

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

It is a cyclic number.

It is not a de Polignac number, because 716520019 - 2¹ = 716520017 is a prime.

It is a super-2 number, since 2×716520019² = 1026801875255520722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 23113549 = 716520019 / (7 + 1 + 6 + 5 + 2 + 0 + 0 + 1 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (716520017) 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, 11556744 + ... + 11556805.

It is an arithmetic number, because the mean of its divisors is an integer number (184908400).

Almost surely, 2^716520019 is an apocalyptic number.

716520019 is a deficient number, since it is larger than the sum of its proper divisors (23113581).

716520019 is a wasteful number, since it uses less digits than its factorization.

716520019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23113580.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 716520019 is about 26767.8915680709. The cubic root of 716520019 is about 894.8346163000.

The spelling of 716520019 in words is "seven hundred sixteen million, five hundred twenty thousand, nineteen".