404242197 has 4 divisors (see below), whose sum is σ = 538989600. Its totient is φ = 269494796.

The previous prime is 404242169. The next prime is 404242199. The reversal of 404242197 is 791242404.

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 404242197 - 2¹¹ = 404240149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404242199) 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 3 ways as a sum of consecutive naturals, for example, 67373697 + ... + 67373702.

It is an arithmetic number, because the mean of its divisors is an integer number (134747400).

Almost surely, 2^404242197 is an apocalyptic number.

It is an amenable number.

404242197 is a deficient number, since it is larger than the sum of its proper divisors (134747403).

404242197 is a wasteful number, since it uses less digits than its factorization.

404242197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134747402.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 404242197 is about 20105.7752150968. The cubic root of 404242197 is about 739.4018766774.

The spelling of 404242197 in words is "four hundred four million, two hundred forty-two thousand, one hundred ninety-seven".