11961967 has 2 divisors, whose sum is σ = 11961968. Its totient is φ = 11961966.

The previous prime is 11961899. The next prime is 11961973. The reversal of 11961967 is 76916911.

It is a strong prime.

It is an emirp because it is prime and its reverse (76916911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11961967 - 2⁷ = 11961839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11961997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5980983 + 5980984.

It is an arithmetic number, because the mean of its divisors is an integer number (5980984).

Almost surely, 2^11961967 is an apocalyptic number.

11961967 is a deficient number, since it is larger than the sum of its proper divisors (1).

11961967 is an equidigital number, since it uses as much as digits as its factorization.

11961967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 40.

The square root of 11961967 is about 3458.6076678340. The cubic root of 11961967 is about 228.7007207691.

It can be divided in two parts, 1196 and 1967, that multiplied together give a palindrome (2352532).

The spelling of 11961967 in words is "eleven million, nine hundred sixty-one thousand, nine hundred sixty-seven".