407991171 has 16 divisors (see below), whose sum is σ = 622012928. Its totient is φ = 233020800.

The previous prime is 407991167. The next prime is 407991173. The reversal of 407991171 is 171199704.

It is not a de Polignac number, because 407991171 - 2² = 407991167 is a prime.

It is a super-2 number, since 2×407991171² = 332913591227902482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (407991173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55131 + ... + 62091.

It is an arithmetic number, because the mean of its divisors is an integer number (38875808).

Almost surely, 2^407991171 is an apocalyptic number.

407991171 is a deficient number, since it is larger than the sum of its proper divisors (214021757).

407991171 is a wasteful number, since it uses less digits than its factorization.

407991171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9762.

The product of its (nonzero) digits is 15876, while the sum is 39.

The square root of 407991171 is about 20198.7913252254. The cubic root of 407991171 is about 741.6806038593.

The spelling of 407991171 in words is "four hundred seven million, nine hundred ninety-one thousand, one hundred seventy-one".