961191967 has 2 divisors, whose sum is σ = 961191968. Its totient is φ = 961191966.

The previous prime is 961191953. The next prime is 961192003. The reversal of 961191967 is 769191169.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961191967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 961191967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961191937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480595983 + 480595984.

It is an arithmetic number, because the mean of its divisors is an integer number (480595984).

Almost surely, 2^961191967 is an apocalyptic number.

961191967 is a deficient number, since it is larger than the sum of its proper divisors (1).

961191967 is an equidigital number, since it uses as much as digits as its factorization.

961191967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 49.

The square root of 961191967 is about 31003.0960873265. The cubic root of 961191967 is about 986.8929446758.

The spelling of 961191967 in words is "nine hundred sixty-one million, one hundred ninety-one thousand, nine hundred sixty-seven".