201623090 has 8 divisors (see below), whose sum is σ = 362921580. Its totient is φ = 80649232.

The previous prime is 201623069. The next prime is 201623099. The reversal of 201623090 is 90326102.

It can be written as a sum of positive squares in 2 ways, for example, as 182709289 + 18913801 = 13517^2 + 4349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×201623090² = 81303740842296200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201623099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10081145 + ... + 10081164.

Almost surely, 2^201623090 is an apocalyptic number.

201623090 is a deficient number, since it is larger than the sum of its proper divisors (161298490).

201623090 is a wasteful number, since it uses less digits than its factorization.

201623090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20162316.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 201623090 is about 14199.4045649809. The cubic root of 201623090 is about 586.3812686534.

Adding to 201623090 its reverse (90326102), we get a palindrome (291949192).

The spelling of 201623090 in words is "two hundred one million, six hundred twenty-three thousand, ninety".