641459023 has 4 divisors (see below), whose sum is σ = 645707248. Its totient is φ = 637210800.

The previous prime is 641459009. The next prime is 641459041. The reversal of 641459023 is 320954146.

It is a happy number.

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 641459023 - 2²¹ = 639361871 is a prime.

It is a super-3 number, since 3×641459023³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641459023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671459023) 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, 2123886 + ... + 2124187.

It is an arithmetic number, because the mean of its divisors is an integer number (161426812).

Almost surely, 2^641459023 is an apocalyptic number.

641459023 is a deficient number, since it is larger than the sum of its proper divisors (4248225).

641459023 is a wasteful number, since it uses less digits than its factorization.

641459023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248224.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 641459023 is about 25327.0413392485. The cubic root of 641459023 is about 862.4282477032.

The spelling of 641459023 in words is "six hundred forty-one million, four hundred fifty-nine thousand, twenty-three".