642364747 has 8 divisors (see below), whose sum is σ = 650308752. Its totient is φ = 634452000.

The previous prime is 642364727. The next prime is 642364757. The reversal of 642364747 is 747463246.

642364747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642364747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642364727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34968 + ... + 50074.

It is an arithmetic number, because the mean of its divisors is an integer number (81288594).

Almost surely, 2^642364747 is an apocalyptic number.

642364747 is a deficient number, since it is larger than the sum of its proper divisors (7944005).

642364747 is a wasteful number, since it uses less digits than its factorization.

642364747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15629.

The product of its digits is 677376, while the sum is 43.

The square root of 642364747 is about 25344.9156045152. The cubic root of 642364747 is about 862.8339658036.

The spelling of 642364747 in words is "six hundred forty-two million, three hundred sixty-four thousand, seven hundred forty-seven".