1890131063 has 2 divisors, whose sum is σ = 1890131064. Its totient is φ = 1890131062.

The previous prime is 1890131059. The next prime is 1890131081. The reversal of 1890131063 is 3601310981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1890131063 - 2² = 1890131059 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890131363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945065531 + 945065532.

It is an arithmetic number, because the mean of its divisors is an integer number (945065532).

Almost surely, 2^1890131063 is an apocalyptic number.

1890131063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890131063 is an equidigital number, since it uses as much as digits as its factorization.

1890131063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1890131063 is about 43475.6375801437. The cubic root of 1890131063 is about 1236.4141685420.

The spelling of 1890131063 in words is "one billion, eight hundred ninety million, one hundred thirty-one thousand, sixty-three".