404000197 has 4 divisors (see below), whose sum is σ = 405764620. Its totient is φ = 402235776.

The previous prime is 404000171. The next prime is 404000213. The reversal of 404000197 is 791000404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 371178756 + 32821441 = 19266^2 + 5729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404000197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404000137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881868 + ... + 882325.

It is an arithmetic number, because the mean of its divisors is an integer number (101441155).

Almost surely, 2^404000197 is an apocalyptic number.

It is an amenable number.

404000197 is a deficient number, since it is larger than the sum of its proper divisors (1764423).

404000197 is a wasteful number, since it uses less digits than its factorization.

404000197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764422.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 404000197 is about 20099.7561427993. The cubic root of 404000197 is about 739.2542993307.

The spelling of 404000197 in words is "four hundred four million, one hundred ninety-seven", and thus it is an aban number.