4090691 has 8 divisors (see below), whose sum is σ = 4479024. Its totient is φ = 3705120.

The previous prime is 4090679. The next prime is 4090703. The reversal of 4090691 is 1960904.

It is an interprime number because it is at equal distance from previous prime (4090679) and next prime (4090703).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4090691 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4090651) 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 7 ways as a sum of consecutive naturals, for example, 3605 + ... + 4601.

It is an arithmetic number, because the mean of its divisors is an integer number (559878).

Almost surely, 2^4090691 is an apocalyptic number.

4090691 is a deficient number, since it is larger than the sum of its proper divisors (388333).

4090691 is a wasteful number, since it uses less digits than its factorization.

4090691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 4090691 is about 2022.5456731555. The cubic root of 4090691 is about 159.9308425079.

The spelling of 4090691 in words is "four million, ninety thousand, six hundred ninety-one".