961001301991 has 2 divisors, whose sum is σ = 961001301992. Its totient is φ = 961001301990.

The previous prime is 961001301977. The next prime is 961001302049. The reversal of 961001301991 is 199103100169.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 961001301991 - 2⁵ = 961001301959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961001301391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480500650995 + 480500650996.

It is an arithmetic number, because the mean of its divisors is an integer number (480500650996).

Almost surely, 2^961001301991 is an apocalyptic number.

961001301991 is a deficient number, since it is larger than the sum of its proper divisors (1).

961001301991 is an equidigital number, since it uses as much as digits as its factorization.

961001301991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 40.

The spelling of 961001301991 in words is "nine hundred sixty-one billion, one million, three hundred one thousand, nine hundred ninety-one".