11661949 has 8 divisors (see below), whose sum is σ = 13298040. Its totient is φ = 10131456.

The previous prime is 11661911. The next prime is 11661959. The reversal of 11661949 is 94916611.

It can be written as a sum of positive squares in 4 ways, for example, as 573049 + 11088900 = 757^2 + 3330^2 .

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

It is not a de Polignac number, because 11661949 - 2¹⁵ = 11629181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661959) 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, 26164 + ... + 26605.

It is an arithmetic number, because the mean of its divisors is an integer number (1662255).

Almost surely, 2^11661949 is an apocalyptic number.

It is an amenable number.

11661949 is a deficient number, since it is larger than the sum of its proper divisors (1636091).

11661949 is a wasteful number, since it uses less digits than its factorization.

11661949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52799.

The product of its digits is 11664, while the sum is 37.

The square root of 11661949 is about 3414.9595898048. The cubic root of 11661949 is about 226.7724955163.

The spelling of 11661949 in words is "eleven million, six hundred sixty-one thousand, nine hundred forty-nine".