10391691 has 8 divisors (see below), whose sum is σ = 13873360. Its totient is φ = 6918912.

The previous prime is 10391687. The next prime is 10391701. The reversal of 10391691 is 19619301.

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

It is not a de Polignac number, because 10391691 - 2² = 10391687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10391621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311 + ... + 4743.

It is an arithmetic number, because the mean of its divisors is an integer number (1734170).

Almost surely, 2^10391691 is an apocalyptic number.

10391691 is a deficient number, since it is larger than the sum of its proper divisors (3481669).

10391691 is a wasteful number, since it uses less digits than its factorization.

10391691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 10391691 is about 3223.6145861439. The cubic root of 10391691 is about 218.2204304611.

The spelling of 10391691 in words is "ten million, three hundred ninety-one thousand, six hundred ninety-one".