197798513 has 8 divisors (see below), whose sum is σ = 220371840. Its totient is φ = 175990480.

The previous prime is 197798509. The next prime is 197798527. The reversal of 197798513 is 315897791.

197798513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 197798513 - 2² = 197798509 is a prime.

It is a super-2 number, since 2×197798513² = 78248503490022338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197798533) 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, 190778 + ... + 191811.

It is an arithmetic number, because the mean of its divisors is an integer number (27546480).

Almost surely, 2^197798513 is an apocalyptic number.

It is an amenable number.

197798513 is a deficient number, since it is larger than the sum of its proper divisors (22573327).

197798513 is a wasteful number, since it uses less digits than its factorization.

197798513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382647.

The product of its digits is 476280, while the sum is 50.

The square root of 197798513 is about 14064.0859283496. The cubic root of 197798513 is about 582.6498971375.

The spelling of 197798513 in words is "one hundred ninety-seven million, seven hundred ninety-eight thousand, five hundred thirteen".