642620233 has 8 divisors (see below), whose sum is σ = 645765120. Its totient is φ = 639482880.

The previous prime is 642620201. The next prime is 642620239. The reversal of 642620233 is 332026246.

642620233 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 not a de Polignac number, because 642620233 - 2⁵ = 642620201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642620239) 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, 237816 + ... + 240502.

It is an arithmetic number, because the mean of its divisors is an integer number (80720640).

Almost surely, 2^642620233 is an apocalyptic number.

It is an amenable number.

642620233 is a deficient number, since it is larger than the sum of its proper divisors (3144887).

642620233 is a wasteful number, since it uses less digits than its factorization.

642620233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 642620233 is about 25349.9552859566. The cubic root of 642620233 is about 862.9483415176.

Adding to 642620233 its reverse (332026246), we get a palindrome (974646479).

The spelling of 642620233 in words is "six hundred forty-two million, six hundred twenty thousand, two hundred thirty-three".