197291015 has 4 divisors (see below), whose sum is σ = 236749224. Its totient is φ = 157832808.

The previous prime is 197290997. The next prime is 197291023. The reversal of 197291015 is 510192791.

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 197291015 - 2²⁰ = 196242439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19729097 + ... + 19729106.

It is an arithmetic number, because the mean of its divisors is an integer number (59187306).

Almost surely, 2^197291015 is an apocalyptic number.

197291015 is a deficient number, since it is larger than the sum of its proper divisors (39458209).

197291015 is an equidigital number, since it uses as much as digits as its factorization.

197291015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39458208.

The product of its (nonzero) digits is 5670, while the sum is 35.

The square root of 197291015 is about 14046.0320019570. The cubic root of 197291015 is about 582.1511625003.

The spelling of 197291015 in words is "one hundred ninety-seven million, two hundred ninety-one thousand, fifteen".