1892378641 has 2 divisors, whose sum is σ = 1892378642. Its totient is φ = 1892378640.

The previous prime is 1892378627. The next prime is 1892378699. The reversal of 1892378641 is 1468732981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1180609600 + 711769041 = 34360^2 + 26679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1892378641 - 2⁹ = 1892378129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1892378611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 946189320 + 946189321.

It is an arithmetic number, because the mean of its divisors is an integer number (946189321).

Almost surely, 2^1892378641 is an apocalyptic number.

It is an amenable number.

1892378641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1892378641 is an equidigital number, since it uses as much as digits as its factorization.

1892378641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 1892378641 is about 43501.4786070543. The cubic root of 1892378641 is about 1236.9040528286.

The spelling of 1892378641 in words is "one billion, eight hundred ninety-two million, three hundred seventy-eight thousand, six hundred forty-one".