404197247 has 4 divisors (see below), whose sum is σ = 405874656. Its totient is φ = 402519840.

The previous prime is 404197231. The next prime is 404197289. The reversal of 404197247 is 742791404.

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 404197247 - 2⁴ = 404197231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404197247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404197847) 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, 838343 + ... + 838824.

It is an arithmetic number, because the mean of its divisors is an integer number (101468664).

Almost surely, 2^404197247 is an apocalyptic number.

404197247 is a deficient number, since it is larger than the sum of its proper divisors (1677409).

404197247 is a wasteful number, since it uses less digits than its factorization.

404197247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677408.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 404197247 is about 20104.6573459982. The cubic root of 404197247 is about 739.3744695548.

The spelling of 404197247 in words is "four hundred four million, one hundred ninety-seven thousand, two hundred forty-seven".