197665149 has 8 divisors (see below), whose sum is σ = 287512992. Its totient is φ = 119797040.

The previous prime is 197665147. The next prime is 197665157. The reversal of 197665149 is 941566791.

It is a happy number.

197665149 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 not a de Polignac number, because 197665149 - 2¹ = 197665147 is a prime.

It is a super-2 number, since 2×197665149² = 78143022258384402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197665098 and 197665107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197665147) 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, 2994894 + ... + 2994959.

It is an arithmetic number, because the mean of its divisors is an integer number (35939124).

Almost surely, 2^197665149 is an apocalyptic number.

It is an amenable number.

197665149 is a deficient number, since it is larger than the sum of its proper divisors (89847843).

197665149 is a wasteful number, since it uses less digits than its factorization.

197665149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5989867.

The product of its digits is 408240, while the sum is 48.

The square root of 197665149 is about 14059.3438324838. The cubic root of 197665149 is about 582.5189187492.

The spelling of 197665149 in words is "one hundred ninety-seven million, six hundred sixty-five thousand, one hundred forty-nine".