1896279961 has 2 divisors, whose sum is σ = 1896279962. Its totient is φ = 1896279960.

The previous prime is 1896279947. The next prime is 1896279989. The reversal of 1896279961 is 1699726981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1852785936 + 43494025 = 43044^2 + 6595^2 .

It is an emirp because it is prime and its reverse (1699726981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1896279961 - 2⁹ = 1896279449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1896279896 and 1896279905.

It is not a weakly prime, because it can be changed into another prime (1896279911) 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, 948139980 + 948139981.

It is an arithmetic number, because the mean of its divisors is an integer number (948139981).

Almost surely, 2^1896279961 is an apocalyptic number.

It is an amenable number.

1896279961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1896279961 is an equidigital number, since it uses as much as digits as its factorization.

1896279961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 58.

The square root of 1896279961 is about 43546.2967541443. The cubic root of 1896279961 is about 1237.7534681430.

The spelling of 1896279961 in words is "one billion, eight hundred ninety-six million, two hundred seventy-nine thousand, nine hundred sixty-one".