4381691 has 8 divisors (see below), whose sum is σ = 4501200. Its totient is φ = 4263840.

The previous prime is 4381681. The next prime is 4381693. The reversal of 4381691 is 1961834.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4381691 - 2²² = 187387 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4381693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6320 + ... + 6978.

It is an arithmetic number, because the mean of its divisors is an integer number (562650).

Almost surely, 2^4381691 is an apocalyptic number.

4381691 is a deficient number, since it is larger than the sum of its proper divisors (119509).

4381691 is a wasteful number, since it uses less digits than its factorization.

4381691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its digits is 5184, while the sum is 32.

The square root of 4381691 is about 2093.2489101872. The cubic root of 4381691 is about 163.6366509628.

The spelling of 4381691 in words is "four million, three hundred eighty-one thousand, six hundred ninety-one".