641020727 has 16 divisors (see below), whose sum is σ = 699324000. Its totient is φ = 585252864.

The previous prime is 641020711. The next prime is 641020729. The reversal of 641020727 is 727020146.

It is a cyclic number.

It is not a de Polignac number, because 641020727 - 2⁴ = 641020711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641020727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641020729) 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, 555383 + ... + 556535.

It is an arithmetic number, because the mean of its divisors is an integer number (43707750).

Almost surely, 2^641020727 is an apocalyptic number.

641020727 is a deficient number, since it is larger than the sum of its proper divisors (58303273).

641020727 is a wasteful number, since it uses less digits than its factorization.

641020727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 641020727 is about 25318.3871326749. The cubic root of 641020727 is about 862.2317763447.

The spelling of 641020727 in words is "six hundred forty-one million, twenty thousand, seven hundred twenty-seven".