1990100212 has 6 divisors (see below), whose sum is σ = 3482675378. Its totient is φ = 995050104.

The previous prime is 1990100207. The next prime is 1990100219. The reversal of 1990100212 is 2120010991.

It can be written as a sum of positive squares in only one way, i.e., 1574184976 + 415915236 = 39676^2 + 20394^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990100219) 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, 248762523 + ... + 248762530.

Almost surely, 2^1990100212 is an apocalyptic number.

It is an amenable number.

1990100212 is a deficient number, since it is larger than the sum of its proper divisors (1492575166).

1990100212 is a wasteful number, since it uses less digits than its factorization.

1990100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497525057 (or 497525055 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1990100212 is about 44610.5392480297. The cubic root of 1990100212 is about 1257.8387852281.

The spelling of 1990100212 in words is "one billion, nine hundred ninety million, one hundred thousand, two hundred twelve".