945397189819 has 2 divisors, whose sum is σ = 945397189820. Its totient is φ = 945397189818.

The previous prime is 945397189801. The next prime is 945397189859. The reversal of 945397189819 is 918981793549.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 945397189819 - 2⁵ = 945397189787 is a prime.

It is a super-2 number, since 2×945397189819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (945397189859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472698594909 + 472698594910.

It is an arithmetic number, because the mean of its divisors is an integer number (472698594910).

Almost surely, 2^945397189819 is an apocalyptic number.

945397189819 is a deficient number, since it is larger than the sum of its proper divisors (1).

945397189819 is an equidigital number, since it uses as much as digits as its factorization.

945397189819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176359680, while the sum is 73.

The spelling of 945397189819 in words is "nine hundred forty-five billion, three hundred ninety-seven million, one hundred eighty-nine thousand, eight hundred nineteen".