1990350171 has 16 divisors (see below), whose sum is σ = 2990200320. Its totient is φ = 1308210120.

The previous prime is 1990350169. The next prime is 1990350211. The reversal of 1990350171 is 1710530991.

It is not a de Polignac number, because 1990350171 - 2¹ = 1990350169 is a prime.

It is a super-2 number, since 2×1990350171² = 7922987606399458482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990352171) 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 in 15 ways as a sum of consecutive naturals, for example, 517215 + ... + 521048.

It is an arithmetic number, because the mean of its divisors is an integer number (186887520).

Almost surely, 2^1990350171 is an apocalyptic number.

1990350171 is a deficient number, since it is larger than the sum of its proper divisors (999850149).

1990350171 is a wasteful number, since it uses less digits than its factorization.

1990350171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038343 (or 1038337 counting only the distinct ones).

The product of its (nonzero) digits is 8505, while the sum is 36.

The square root of 1990350171 is about 44613.3407289793. The cubic root of 1990350171 is about 1257.8914450490.

The spelling of 1990350171 in words is "one billion, nine hundred ninety million, three hundred fifty thousand, one hundred seventy-one".