11961487 has 2 divisors, whose sum is σ = 11961488. Its totient is φ = 11961486.

The previous prime is 11961461. The next prime is 11961491. The reversal of 11961487 is 78416911.

11961487 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 is an emirp because it is prime and its reverse (78416911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11961487 - 2¹¹ = 11959439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11961407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5980743 + 5980744.

It is an arithmetic number, because the mean of its divisors is an integer number (5980744).

Almost surely, 2^11961487 is an apocalyptic number.

11961487 is a deficient number, since it is larger than the sum of its proper divisors (1).

11961487 is an equidigital number, since it uses as much as digits as its factorization.

11961487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 37.

The square root of 11961487 is about 3458.5382750520. The cubic root of 11961487 is about 228.6976616898.

The spelling of 11961487 in words is "eleven million, nine hundred sixty-one thousand, four hundred eighty-seven".