11987977 has 2 divisors, whose sum is σ = 11987978. Its totient is φ = 11987976.

The previous prime is 11987971. The next prime is 11987981. The reversal of 11987977 is 77978911.

11987977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11148921 + 839056 = 3339^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 11987977 - 2²³ = 3599369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11987977.

It is not a weakly prime, because it can be changed into another prime (11987971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5993988 + 5993989.

It is an arithmetic number, because the mean of its divisors is an integer number (5993989).

Almost surely, 2^11987977 is an apocalyptic number.

It is an amenable number.

11987977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11987977 is an equidigital number, since it uses as much as digits as its factorization.

11987977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 49.

The square root of 11987977 is about 3462.3658096741. The cubic root of 11987977 is about 228.8663624089.

The spelling of 11987977 in words is "eleven million, nine hundred eighty-seven thousand, nine hundred seventy-seven".