641133629 has 4 divisors (see below), whose sum is σ = 641203584. Its totient is φ = 641063676.

The previous prime is 641133613. The next prime is 641133643. The reversal of 641133629 is 926331146.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 641133629 - 2⁴ = 641133613 is a prime.

It is a super-2 number, since 2×641133629² = 822104660469419282, 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 (641133029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18707 + ... + 40400.

It is an arithmetic number, because the mean of its divisors is an integer number (160300896).

Almost surely, 2^641133629 is an apocalyptic number.

It is an amenable number.

641133629 is a deficient number, since it is larger than the sum of its proper divisors (69955).

641133629 is a wasteful number, since it uses less digits than its factorization.

641133629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69954.

The product of its digits is 23328, while the sum is 35.

The square root of 641133629 is about 25320.6166789042. The cubic root of 641133629 is about 862.2823945610.

The spelling of 641133629 in words is "six hundred forty-one million, one hundred thirty-three thousand, six hundred twenty-nine".