641204293 has 4 divisors (see below), whose sum is σ = 642244140. Its totient is φ = 640164448.

The previous prime is 641204287. The next prime is 641204323. The reversal of 641204293 is 392402146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 392402146 = 2 ⋅196201073.

It can be written as a sum of positive squares in 2 ways, for example, as 90973444 + 550230849 = 9538^2 + 23457^2 .

It is a cyclic number.

It is not a de Polignac number, because 641204293 - 2⁹ = 641203781 is a prime.

It is a super-2 number, since 2×641204293² = 822285890723259698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641204203) 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, 518998 + ... + 520231.

It is an arithmetic number, because the mean of its divisors is an integer number (160561035).

Almost surely, 2^641204293 is an apocalyptic number.

It is an amenable number.

641204293 is a deficient number, since it is larger than the sum of its proper divisors (1039847).

641204293 is a wasteful number, since it uses less digits than its factorization.

641204293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039846.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 641204293 is about 25322.0120251136. The cubic root of 641204293 is about 862.3140728685.

The spelling of 641204293 in words is "six hundred forty-one million, two hundred four thousand, two hundred ninety-three".