197513263817 has 4 divisors (see below), whose sum is σ = 203884659456. Its totient is φ = 191141868180.

The previous prime is 197513263733. The next prime is 197513263819. The reversal of 197513263817 is 718362315791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197513263817 - 2¹² = 197513259721 is a prime.

It is a super-2 number, since 2×197513263817² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197513263819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3185697773 + ... + 3185697834.

It is an arithmetic number, because the mean of its divisors is an integer number (50971164864).

Almost surely, 2^197513263817 is an apocalyptic number.

It is an amenable number.

197513263817 is a deficient number, since it is larger than the sum of its proper divisors (6371395639).

197513263817 is an equidigital number, since it uses as much as digits as its factorization.

197513263817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371395638.

The product of its digits is 1905120, while the sum is 53.

The spelling of 197513263817 in words is "one hundred ninety-seven billion, five hundred thirteen million, two hundred sixty-three thousand, eight hundred seventeen".