201002423 has 4 divisors (see below), whose sum is σ = 202992648. Its totient is φ = 199012200.

The previous prime is 201002413. The next prime is 201002437. The reversal of 201002423 is 324200102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201002423 - 2¹⁸ = 200740279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201002398 and 201002407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201002413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994961 + ... + 995162.

It is an arithmetic number, because the mean of its divisors is an integer number (50748162).

Almost surely, 2^201002423 is an apocalyptic number.

201002423 is a deficient number, since it is larger than the sum of its proper divisors (1990225).

201002423 is a wasteful number, since it uses less digits than its factorization.

201002423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990224.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 201002423 is about 14177.5323311217. The cubic root of 201002423 is about 585.7789540478.

Adding to 201002423 its reverse (324200102), we get a palindrome (525202525).

The spelling of 201002423 in words is "two hundred one million, two thousand, four hundred twenty-three".