11861669 has 4 divisors (see below), whose sum is σ = 12151020. Its totient is φ = 11572320.

The previous prime is 11861659. The next prime is 11861671. The reversal of 11861669 is 96616811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96616811 = 349 ⋅276839.

It can be written as a sum of positive squares in 2 ways, for example, as 1221025 + 10640644 = 1105^2 + 3262^2 .

It is a cyclic number.

It is not a de Polignac number, because 11861669 - 2⁸ = 11861413 is a prime.

It is a super-2 number, since 2×11861669² = 281398382931122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11861639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144614 + ... + 144695.

It is an arithmetic number, because the mean of its divisors is an integer number (3037755).

Almost surely, 2^11861669 is an apocalyptic number.

It is an amenable number.

11861669 is a deficient number, since it is larger than the sum of its proper divisors (289351).

11861669 is an equidigital number, since it uses as much as digits as its factorization.

11861669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289350.

The product of its digits is 15552, while the sum is 38.

The square root of 11861669 is about 3444.0773800831. The cubic root of 11861669 is about 228.0597270938.

The spelling of 11861669 in words is "eleven million, eight hundred sixty-one thousand, six hundred sixty-nine".