1995249847 has 2 divisors, whose sum is σ = 1995249848. Its totient is φ = 1995249846.

The previous prime is 1995249803. The next prime is 1995249857. The reversal of 1995249847 is 7489425991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1995249847 - 2⁷ = 1995249719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1995249791 and 1995249800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1995249857) 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, 997624923 + 997624924.

It is an arithmetic number, because the mean of its divisors is an integer number (997624924).

Almost surely, 2^1995249847 is an apocalyptic number.

1995249847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995249847 is an equidigital number, since it uses as much as digits as its factorization.

1995249847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 58.

The square root of 1995249847 is about 44668.2196533509. The cubic root of 1995249847 is about 1258.9227895365.

The spelling of 1995249847 in words is "one billion, nine hundred ninety-five million, two hundred forty-nine thousand, eight hundred forty-seven".