11945977 has 4 divisors (see below), whose sum is σ = 12064356. Its totient is φ = 11827600.

The previous prime is 11945971. The next prime is 11945981. The reversal of 11945977 is 77954911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77954911 = 17 ⋅4585583.

It can be written as a sum of positive squares in 2 ways, for example, as 7123561 + 4822416 = 2669^2 + 2196^2 .

It is a cyclic number.

It is not a de Polignac number, because 11945977 - 2¹¹ = 11943929 is a prime.

It is a super-3 number, since 3×11945977³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11945971) 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, 59038 + ... + 59239.

It is an arithmetic number, because the mean of its divisors is an integer number (3016089).

Almost surely, 2^11945977 is an apocalyptic number.

It is an amenable number.

11945977 is a deficient number, since it is larger than the sum of its proper divisors (118379).

11945977 is a wasteful number, since it uses less digits than its factorization.

11945977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118378.

The product of its digits is 79380, while the sum is 43.

The square root of 11945977 is about 3456.2952709513. The cubic root of 11945977 is about 228.5987711152.

The spelling of 11945977 in words is "eleven million, nine hundred forty-five thousand, nine hundred seventy-seven".