1890382274987 has 2 divisors, whose sum is σ = 1890382274988. Its totient is φ = 1890382274986.

The previous prime is 1890382274819. The next prime is 1890382275053. The reversal of 1890382274987 is 7894722830981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1890382274987 - 2¹⁶ = 1890382209451 is a prime.

It is not a weakly prime, because it can be changed into another prime (1890382174987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945191137493 + 945191137494.

It is an arithmetic number, because the mean of its divisors is an integer number (945191137494).

Almost surely, 2^{1890382274987} is an apocalyptic number.

1890382274987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890382274987 is an equidigital number, since it uses as much as digits as its factorization.

1890382274987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97542144, while the sum is 68.

The spelling of 1890382274987 in words is "one trillion, eight hundred ninety billion, three hundred eighty-two million, two hundred seventy-four thousand, nine hundred eighty-seven".