642043153 has 2 divisors, whose sum is σ = 642043154. Its totient is φ = 642043152.

The previous prime is 642043141. The next prime is 642043159. The reversal of 642043153 is 351340246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 641710224 + 332929 = 25332^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 642043153 - 2⁹ = 642042641 is a prime.

It is not a weakly prime, because it can be changed into another prime (642043159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321021576 + 321021577.

It is an arithmetic number, because the mean of its divisors is an integer number (321021577).

Almost surely, 2^642043153 is an apocalyptic number.

It is an amenable number.

642043153 is a deficient number, since it is larger than the sum of its proper divisors (1).

642043153 is an equidigital number, since it uses as much as digits as its factorization.

642043153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 642043153 is about 25338.5704608607. The cubic root of 642043153 is about 862.6899518059.

Adding to 642043153 its reverse (351340246), we get a palindrome (993383399).

The spelling of 642043153 in words is "six hundred forty-two million, forty-three thousand, one hundred fifty-three".