404122731 has 4 divisors (see below), whose sum is σ = 538830312. Its totient is φ = 269415152.

The previous prime is 404122711. The next prime is 404122739. The reversal of 404122731 is 137221404.

It is a happy number.

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 404122731 - 2⁹ = 404122219 is a prime.

It is a super-2 number, since 2×404122731² = 326630363421796722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (404122739) 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, 67353786 + ... + 67353791.

It is an arithmetic number, because the mean of its divisors is an integer number (134707578).

Almost surely, 2^404122731 is an apocalyptic number.

404122731 is a deficient number, since it is larger than the sum of its proper divisors (134707581).

404122731 is a wasteful number, since it uses less digits than its factorization.

404122731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134707580.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 404122731 is about 20102.8040581407. The cubic root of 404122731 is about 739.3290308369.

The spelling of 404122731 in words is "four hundred four million, one hundred twenty-two thousand, seven hundred thirty-one".