961894189387 has 2 divisors, whose sum is σ = 961894189388. Its totient is φ = 961894189386.

The previous prime is 961894189369. The next prime is 961894189429. The reversal of 961894189387 is 783981498169.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961894189387 is a prime.

It is not a weakly prime, because it can be changed into another prime (961894189687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480947094693 + 480947094694.

It is an arithmetic number, because the mean of its divisors is an integer number (480947094694).

Almost surely, 2^961894189387 is an apocalyptic number.

961894189387 is a deficient number, since it is larger than the sum of its proper divisors (1).

961894189387 is an equidigital number, since it uses as much as digits as its factorization.

961894189387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188116992, while the sum is 73.

The spelling of 961894189387 in words is "nine hundred sixty-one billion, eight hundred ninety-four million, one hundred eighty-nine thousand, three hundred eighty-seven".