197691049 has 8 divisors (see below), whose sum is σ = 206661312. Its totient is φ = 188752080.

The previous prime is 197691047. The next prime is 197691073. The reversal of 197691049 is 940196791.

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 197691049 - 2¹ = 197691047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197691041) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5607 + ... + 20659.

It is an arithmetic number, because the mean of its divisors is an integer number (25832664).

Almost surely, 2^197691049 is an apocalyptic number.

It is an amenable number.

197691049 is a deficient number, since it is larger than the sum of its proper divisors (8970263).

197691049 is a wasteful number, since it uses less digits than its factorization.

197691049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15647.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 197691049 is about 14060.2648979313. The cubic root of 197691049 is about 582.5443600593.

It can be divided in two parts, 1976 and 91049, that added together give a square (93025 = 305²).

The spelling of 197691049 in words is "one hundred ninety-seven million, six hundred ninety-one thousand, forty-nine".