641212629 has 4 divisors (see below), whose sum is σ = 854950176. Its totient is φ = 427475084.

The previous prime is 641212597. The next prime is 641212631. The reversal of 641212629 is 926212146.

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 641212629 - 2⁵ = 641212597 is a prime.

It is a super-2 number, since 2×641212629² = 822307271178183282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641212629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641212669) 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, 106868769 + ... + 106868774.

It is an arithmetic number, because the mean of its divisors is an integer number (213737544).

Almost surely, 2^641212629 is an apocalyptic number.

It is an amenable number.

641212629 is a deficient number, since it is larger than the sum of its proper divisors (213737547).

641212629 is a wasteful number, since it uses less digits than its factorization.

641212629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213737546.

The product of its digits is 10368, while the sum is 33.

The square root of 641212629 is about 25322.1766244531. The cubic root of 641212629 is about 862.3178097009.

The spelling of 641212629 in words is "six hundred forty-one million, two hundred twelve thousand, six hundred twenty-nine".