201001090 has 16 divisors (see below), whose sum is σ = 361972800. Its totient is φ = 80362480.

The previous prime is 201001067. The next prime is 201001109. The reversal of 201001090 is 90100102.

It is a self number, because there is not a number n which added to its sum of digits gives 201001090.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28761 + ... + 35059.

It is an arithmetic number, because the mean of its divisors is an integer number (22623300).

Almost surely, 2^201001090 is an apocalyptic number.

201001090 is a deficient number, since it is larger than the sum of its proper divisors (160971710).

201001090 is a wasteful number, since it uses less digits than its factorization.

201001090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9497.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 201001090 is about 14177.4853200418. The cubic root of 201001090 is about 585.7776591296. Note that the first 3 decimals are identical.

Adding to 201001090 its reverse (90100102), we get a palindrome (291101192).

The spelling of 201001090 in words is "two hundred one million, one thousand, ninety".