641954729 has 16 divisors (see below), whose sum is σ = 732648000. Its totient is φ = 557585856.

The previous prime is 641954707. The next prime is 641954743. The reversal of 641954729 is 927459146.

641954729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641954729 - 2¹² = 641950633 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641954749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28082 + ... + 45524.

It is an arithmetic number, because the mean of its divisors is an integer number (45790500).

Almost surely, 2^641954729 is an apocalyptic number.

It is an amenable number.

641954729 is a deficient number, since it is larger than the sum of its proper divisors (90693271).

641954729 is a wasteful number, since it uses less digits than its factorization.

641954729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17624.

The product of its digits is 544320, while the sum is 47.

The square root of 641954729 is about 25336.8255509644. The cubic root of 641954729 is about 862.6503459538.

The spelling of 641954729 in words is "six hundred forty-one million, nine hundred fifty-four thousand, seven hundred twenty-nine".