995223047891 has 2 divisors, whose sum is σ = 995223047892. Its totient is φ = 995223047890.

The previous prime is 995223047887. The next prime is 995223047989. The reversal of 995223047891 is 198740322599.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 995223047891 - 2² = 995223047887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 995223047891.

It is not a weakly prime, because it can be changed into another prime (995223047801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497611523945 + 497611523946.

It is an arithmetic number, because the mean of its divisors is an integer number (497611523946).

Almost surely, 2^995223047891 is an apocalyptic number.

995223047891 is a deficient number, since it is larger than the sum of its proper divisors (1).

995223047891 is an equidigital number, since it uses as much as digits as its factorization.

995223047891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 59.

It can be divided in two parts, 99522 and 3047891, that added together give a palindrome (3147413).

The spelling of 995223047891 in words is "nine hundred ninety-five billion, two hundred twenty-three million, forty-seven thousand, eight hundred ninety-one".