1890076549 has 2 divisors, whose sum is σ = 1890076550. Its totient is φ = 1890076548.

The previous prime is 1890076519. The next prime is 1890076597. The reversal of 1890076549 is 9456700981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1513988100 + 376088449 = 38910^2 + 19393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1890076549 is a prime.

It is a super-2 number, since 2×1890076549² = 7144778722159498802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890076519) 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, 945038274 + 945038275.

It is an arithmetic number, because the mean of its divisors is an integer number (945038275).

Almost surely, 2^1890076549 is an apocalyptic number.

It is an amenable number.

1890076549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890076549 is an equidigital number, since it uses as much as digits as its factorization.

1890076549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 1890076549 is about 43475.0106267957. The cubic root of 1890076549 is about 1236.4022817949.

It can be divided in two parts, 1890076 and 549, that added together give a square (1890625 = 1375²).

The spelling of 1890076549 in words is "one billion, eight hundred ninety million, seventy-six thousand, five hundred forty-nine".