1894282961 has 2 divisors, whose sum is σ = 1894282962. Its totient is φ = 1894282960.

The previous prime is 1894282933. The next prime is 1894282963. The reversal of 1894282961 is 1692824981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166632336 + 727650625 = 34156^2 + 26975^2 .

It is an emirp because it is prime and its reverse (1692824981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1894282961 is a prime.

Together with 1894282963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1894282963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947141480 + 947141481.

It is an arithmetic number, because the mean of its divisors is an integer number (947141481).

Almost surely, 2^1894282961 is an apocalyptic number.

It is an amenable number.

1894282961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894282961 is an equidigital number, since it uses as much as digits as its factorization.

1894282961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 50.

The square root of 1894282961 is about 43523.3610949338. The cubic root of 1894282961 is about 1237.3188168031.

The spelling of 1894282961 in words is "one billion, eight hundred ninety-four million, two hundred eighty-two thousand, nine hundred sixty-one".