1995274243 has 2 divisors, whose sum is σ = 1995274244. Its totient is φ = 1995274242.

The previous prime is 1995274223. The next prime is 1995274283. The reversal of 1995274243 is 3424725991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1995274243 - 2²¹ = 1993177091 is a prime.

It is a super-2 number, since 2×1995274243² = 7962238609558446098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1995274193 and 1995274202.

It is not a weakly prime, because it can be changed into another prime (1995274223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997637121 + 997637122.

It is an arithmetic number, because the mean of its divisors is an integer number (997637122).

Almost surely, 2^1995274243 is an apocalyptic number.

1995274243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995274243 is an equidigital number, since it uses as much as digits as its factorization.

1995274243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 1995274243 is about 44668.4927325738. The cubic root of 1995274243 is about 1258.9279204821.

The spelling of 1995274243 in words is "one billion, nine hundred ninety-five million, two hundred seventy-four thousand, two hundred forty-three".