1895220961 has 2 divisors, whose sum is σ = 1895220962. Its totient is φ = 1895220960.

The previous prime is 1895220917. The next prime is 1895220989. The reversal of 1895220961 is 1690225981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1823717025 + 71503936 = 42705^2 + 8456^2 .

It is an emirp because it is prime and its reverse (1690225981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1895220961 - 2¹³ = 1895212769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1895220161) 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, 947610480 + 947610481.

It is an arithmetic number, because the mean of its divisors is an integer number (947610481).

Almost surely, 2^1895220961 is an apocalyptic number.

It is an amenable number.

1895220961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1895220961 is an equidigital number, since it uses as much as digits as its factorization.

1895220961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 1895220961 is about 43534.1355834706. The cubic root of 1895220961 is about 1237.5230125435.

The spelling of 1895220961 in words is "one billion, eight hundred ninety-five million, two hundred twenty thousand, nine hundred sixty-one".