641424787 has 8 divisors (see below), whose sum is σ = 658551600. Its totient is φ = 624368640.

The previous prime is 641424767. The next prime is 641424809. The reversal of 641424787 is 787424146.

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

It is a cyclic number.

It is not a de Polignac number, because 641424787 - 2⁷ = 641424659 is a prime.

It is a super-2 number, since 2×641424787² = 822851514755990738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641424757) 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 7 ways as a sum of consecutive naturals, for example, 988 + ... + 35830.

It is an arithmetic number, because the mean of its divisors is an integer number (82318950).

Almost surely, 2^641424787 is an apocalyptic number.

641424787 is a deficient number, since it is larger than the sum of its proper divisors (17126813).

641424787 is a wasteful number, since it uses less digits than its factorization.

641424787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35333.

The product of its digits is 301056, while the sum is 43.

The square root of 641424787 is about 25326.3654518369. The cubic root of 641424787 is about 862.4129042348.

The spelling of 641424787 in words is "six hundred forty-one million, four hundred twenty-four thousand, seven hundred eighty-seven".