4191631 has 4 divisors (see below), whose sum is σ = 4336200. Its totient is φ = 4047064.

The previous prime is 4191623. The next prime is 4191641. The reversal of 4191631 is 1361914.

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 4191631 - 2³ = 4191623 is a prime.

It is a super-2 number, since 2×4191631² = 35139540880322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4191596 and 4191605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4191641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72241 + ... + 72298.

It is an arithmetic number, because the mean of its divisors is an integer number (1084050).

Almost surely, 2^4191631 is an apocalyptic number.

4191631 is a deficient number, since it is larger than the sum of its proper divisors (144569).

4191631 is a wasteful number, since it uses less digits than its factorization.

4191631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144568.

The product of its digits is 648, while the sum is 25.

The square root of 4191631 is about 2047.3473081038. The cubic root of 4191631 is about 161.2356283888.

The spelling of 4191631 in words is "four million, one hundred ninety-one thousand, six hundred thirty-one".