404947923 has 4 divisors (see below), whose sum is σ = 539930568. Its totient is φ = 269965280.

The previous prime is 404947903. The next prime is 404947927. The reversal of 404947923 is 329749404.

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 404947923 - 2⁵ = 404947891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404947927) 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, 67491318 + ... + 67491323.

It is an arithmetic number, because the mean of its divisors is an integer number (134982642).

Almost surely, 2^404947923 is an apocalyptic number.

404947923 is a deficient number, since it is larger than the sum of its proper divisors (134982645).

404947923 is a wasteful number, since it uses less digits than its factorization.

404947923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134982644.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 404947923 is about 20123.3178924351. The cubic root of 404947923 is about 739.8319091062.

The spelling of 404947923 in words is "four hundred four million, nine hundred forty-seven thousand, nine hundred twenty-three".