1988191063 has 2 divisors, whose sum is σ = 1988191064. Its totient is φ = 1988191062.

The previous prime is 1988191057. The next prime is 1988191069. The reversal of 1988191063 is 3601918891.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1988191057) and next prime (1988191069).

It is an emirp because it is prime and its reverse (3601918891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1988191063 - 2²⁹ = 1451320151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988191069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994095531 + 994095532.

It is an arithmetic number, because the mean of its divisors is an integer number (994095532).

Almost surely, 2^1988191063 is an apocalyptic number.

1988191063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988191063 is an equidigital number, since it uses as much as digits as its factorization.

1988191063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 1988191063 is about 44589.1361544491. The cubic root of 1988191063 is about 1257.4364319595.

The spelling of 1988191063 in words is "one billion, nine hundred eighty-eight million, one hundred ninety-one thousand, sixty-three".