404936149 has 4 divisors (see below), whose sum is σ = 405193536. Its totient is φ = 404678764.

The previous prime is 404936143. The next prime is 404936171. The reversal of 404936149 is 941639404.

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 a de Polignac number, because none of the positive numbers 2^k-404936149 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404936143) 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, 126319 + ... + 129484.

It is an arithmetic number, because the mean of its divisors is an integer number (101298384).

Almost surely, 2^404936149 is an apocalyptic number.

It is an amenable number.

404936149 is a deficient number, since it is larger than the sum of its proper divisors (257387).

404936149 is a wasteful number, since it uses less digits than its factorization.

404936149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257386.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 404936149 is about 20123.0253441176. The cubic root of 404936149 is about 739.8247387477.

The spelling of 404936149 in words is "four hundred four million, nine hundred thirty-six thousand, one hundred forty-nine".