640230101 has 8 divisors (see below), whose sum is σ = 734974464. Its totient is φ = 546306480.

The previous prime is 640230083. The next prime is 640230109. The reversal of 640230101 is 101032046.

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

It is a cyclic number.

It is not a de Polignac number, because 640230101 - 2¹⁸ = 639967957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 640230101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640230109) by changing a digit.

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, 203510 + ... + 206631.

It is an arithmetic number, because the mean of its divisors is an integer number (91871808).

Almost surely, 2^640230101 is an apocalyptic number.

It is an amenable number.

640230101 is a deficient number, since it is larger than the sum of its proper divisors (94744363).

640230101 is a wasteful number, since it uses less digits than its factorization.

640230101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410371.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 640230101 is about 25302.7686429766. The cubic root of 640230101 is about 861.8771422997.

Adding to 640230101 its reverse (101032046), we get a palindrome (741262147).

The spelling of 640230101 in words is "six hundred forty million, two hundred thirty thousand, one hundred one".