641873229 has 4 divisors (see below), whose sum is σ = 855830976. Its totient is φ = 427915484.

The previous prime is 641873209. The next prime is 641873231. The reversal of 641873229 is 922378146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641873229 - 2⁷ = 641873101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641873209) 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 3 ways as a sum of consecutive naturals, for example, 106978869 + ... + 106978874.

It is an arithmetic number, because the mean of its divisors is an integer number (213957744).

Almost surely, 2^641873229 is an apocalyptic number.

It is an amenable number.

641873229 is a deficient number, since it is larger than the sum of its proper divisors (213957747).

641873229 is a wasteful number, since it uses less digits than its factorization.

641873229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213957746.

The product of its digits is 145152, while the sum is 42.

The square root of 641873229 is about 25335.2171689923. The cubic root of 641873229 is about 862.6138381984.

The spelling of 641873229 in words is "six hundred forty-one million, eight hundred seventy-three thousand, two hundred twenty-nine".