11651691 has 8 divisors (see below), whose sum is σ = 16036864. Its totient is φ = 7517160.

The previous prime is 11651687. The next prime is 11651699. The reversal of 11651691 is 19615611.

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

It is not a de Polignac number, because 11651691 - 2² = 11651687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11651699) 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, 62551 + ... + 62736.

It is an arithmetic number, because the mean of its divisors is an integer number (2004608).

Almost surely, 2^11651691 is an apocalyptic number.

11651691 is a deficient number, since it is larger than the sum of its proper divisors (4385173).

11651691 is a wasteful number, since it uses less digits than its factorization.

11651691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125321.

The product of its digits is 1620, while the sum is 30.

The square root of 11651691 is about 3413.4573382423. The cubic root of 11651691 is about 226.7059853457.

The spelling of 11651691 in words is "eleven million, six hundred fifty-one thousand, six hundred ninety-one".