11978741 has 4 divisors (see below), whose sum is σ = 12365184. Its totient is φ = 11592300.

The previous prime is 11978737. The next prime is 11978819. The reversal of 11978741 is 14787911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11978741 - 2² = 11978737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11978695 and 11978704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11978731) 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, 193175 + ... + 193236.

It is an arithmetic number, because the mean of its divisors is an integer number (3091296).

Almost surely, 2^11978741 is an apocalyptic number.

It is an amenable number.

11978741 is a deficient number, since it is larger than the sum of its proper divisors (386443).

11978741 is an equidigital number, since it uses as much as digits as its factorization.

11978741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386442.

The product of its digits is 14112, while the sum is 38.

The square root of 11978741 is about 3461.0317825758. The cubic root of 11978741 is about 228.8075714828.

The spelling of 11978741 in words is "eleven million, nine hundred seventy-eight thousand, seven hundred forty-one".