11949965 has 4 divisors (see below), whose sum is σ = 14339964. Its totient is φ = 9559968.

The previous prime is 11949953. The next prime is 11949967. The reversal of 11949965 is 56994911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56994911 = 37 ⋅1540403.

It can be written as a sum of positive squares in 2 ways, for example, as 5654884 + 6295081 = 2378^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 11949965 - 2⁸ = 11949709 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 (11949967) 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, 1194992 + ... + 1195001.

It is an arithmetic number, because the mean of its divisors is an integer number (3584991).

Almost surely, 2^11949965 is an apocalyptic number.

It is an amenable number.

11949965 is a deficient number, since it is larger than the sum of its proper divisors (2389999).

11949965 is an equidigital number, since it uses as much as digits as its factorization.

11949965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389998.

The product of its digits is 87480, while the sum is 44.

The square root of 11949965 is about 3456.8721411125. The cubic root of 11949965 is about 228.6242064695.

The spelling of 11949965 in words is "eleven million, nine hundred forty-nine thousand, nine hundred sixty-five".