11931967 has 2 divisors, whose sum is σ = 11931968. Its totient is φ = 11931966.

The previous prime is 11931929. The next prime is 11931989. The reversal of 11931967 is 76913911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11931967 - 2¹¹ = 11929919 is a prime.

It is equal to p₇₈₃₈₇₄ and since 11931967 and 783874 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11931767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5965983 + 5965984.

It is an arithmetic number, because the mean of its divisors is an integer number (5965984).

Almost surely, 2^11931967 is an apocalyptic number.

11931967 is a deficient number, since it is larger than the sum of its proper divisors (1).

11931967 is an equidigital number, since it uses as much as digits as its factorization.

11931967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 37.

The square root of 11931967 is about 3454.2679398101. The cubic root of 11931967 is about 228.5093708201.

It can be divided in two parts, 1193 and 1967, that added together give a triangular number (3160 = T₇₉).

The spelling of 11931967 in words is "eleven million, nine hundred thirty-one thousand, nine hundred sixty-seven".