1990100111 has 2 divisors, whose sum is σ = 1990100112. Its totient is φ = 1990100110.

The previous prime is 1990100083. The next prime is 1990100117. The reversal of 1990100111 is 1110010991.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1110010991) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1110010661 and 1660100111.

It is a cyclic number.

It is not a de Polignac number, because 1990100111 - 2¹⁴ = 1990083727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990100117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995050055 + 995050056.

It is an arithmetic number, because the mean of its divisors is an integer number (995050056).

Almost surely, 2^1990100111 is an apocalyptic number.

1990100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990100111 is an equidigital number, since it uses as much as digits as its factorization.

1990100111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 23.

The square root of 1990100111 is about 44610.5381160102. The cubic root of 1990100111 is about 1257.8387639492.

The spelling of 1990100111 in words is "one billion, nine hundred ninety million, one hundred thousand, one hundred eleven".