1990487349629 has 2 divisors, whose sum is σ = 1990487349630. Its totient is φ = 1990487349628.

The previous prime is 1990487349623. The next prime is 1990487349713. The reversal of 1990487349629 is 9269437840991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1990145025625 + 342324004 = 1410725^2 + 18502^2 .

It is a cyclic number.

It is not a de Polignac number, because 1990487349629 - 2⁸ = 1990487349373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990487349623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995243674814 + 995243674815.

It is an arithmetic number, because the mean of its divisors is an integer number (995243674815).

Almost surely, 2^{1990487349629} is an apocalyptic number.

It is an amenable number.

1990487349629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990487349629 is an equidigital number, since it uses as much as digits as its factorization.

1990487349629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211631616, while the sum is 71.

The spelling of 1990487349629 in words is "one trillion, nine hundred ninety billion, four hundred eighty-seven million, three hundred forty-nine thousand, six hundred twenty-nine".