1997120572719 has 8 divisors (see below), whose sum is σ = 2664258296112. Its totient is φ = 1330698282240.

The previous prime is 1997120572709. The next prime is 1997120572751. The reversal of 1997120572719 is 9172750217991.

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

It is not a de Polignac number, because 1997120572719 - 2⁴ = 1997120572703 is a prime.

It is a super-2 number, since 2×1997120572719² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997120572709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178851714 + ... + 178862879.

It is an arithmetic number, because the mean of its divisors is an integer number (333032287014).

Almost surely, 2^{1997120572719} is an apocalyptic number.

1997120572719 is a deficient number, since it is larger than the sum of its proper divisors (667137723393).

1997120572719 is a wasteful number, since it uses less digits than its factorization.

1997120572719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357716457.

The product of its (nonzero) digits is 5000940, while the sum is 60.

The spelling of 1997120572719 in words is "one trillion, nine hundred ninety-seven billion, one hundred twenty million, five hundred seventy-two thousand, seven hundred nineteen".