1191767 has 2 divisors, whose sum is σ = 1191768. Its totient is φ = 1191766.

The previous prime is 1191761. The next prime is 1191769. The reversal of 1191767 is 7671911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1191767 - 2⁶ = 1191703 is a prime.

Together with 1191769, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1191761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595883 + 595884.

It is an arithmetic number, because the mean of its divisors is an integer number (595884).

2^1191767 is an apocalyptic number.

1191767 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191767 is an equidigital number, since it uses as much as digits as its factorization.

1191767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 32.

The square root of 1191767 is about 1091.6808141577. The cubic root of 1191767 is about 106.0222748964.

The spelling of 1191767 in words is "one million, one hundred ninety-one thousand, seven hundred sixty-seven".