641423734 has 8 divisors (see below), whose sum is σ = 1099583568. Its totient is φ = 274895880.

The previous prime is 641423729. The next prime is 641423773. The reversal of 641423734 is 437324146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×641423734² = 822848813077005512, 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 641423734.

It is a congruent number.

It is an unprimeable number.

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, 22907977 + ... + 22908004.

It is an arithmetic number, because the mean of its divisors is an integer number (137447946).

Almost surely, 2^641423734 is an apocalyptic number.

641423734 is a deficient number, since it is larger than the sum of its proper divisors (458159834).

641423734 is a wasteful number, since it uses less digits than its factorization.

641423734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45815990.

The product of its digits is 48384, while the sum is 34.

The square root of 641423734 is about 25326.3446632158. The cubic root of 641423734 is about 862.4124323056.

It can be divided in two parts, 64142 and 3734, that added together give a palindrome (67876).

The spelling of 641423734 in words is "six hundred forty-one million, four hundred twenty-three thousand, seven hundred thirty-four".