11977747 has 2 divisors, whose sum is σ = 11977748. Its totient is φ = 11977746.

The previous prime is 11977739. The next prime is 11977753. The reversal of 11977747 is 74777911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11977747 - 2³ = 11977739 is a prime.

It is not a weakly prime, because it can be changed into another prime (11977717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5988873 + 5988874.

It is an arithmetic number, because the mean of its divisors is an integer number (5988874).

Almost surely, 2^11977747 is an apocalyptic number.

11977747 is a deficient number, since it is larger than the sum of its proper divisors (1).

11977747 is an equidigital number, since it uses as much as digits as its factorization.

11977747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86436, while the sum is 43.

The square root of 11977747 is about 3460.8881807998. Note that the first 3 decimals coincide. The cubic root of 11977747 is about 228.8012424644.

The spelling of 11977747 in words is "eleven million, nine hundred seventy-seven thousand, seven hundred forty-seven".