642053627 has 2 divisors, whose sum is σ = 642053628. Its totient is φ = 642053626.

The previous prime is 642053593. The next prime is 642053641. The reversal of 642053627 is 726350246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642053627 - 2²⁰ = 641005051 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (642053647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321026813 + 321026814.

It is an arithmetic number, because the mean of its divisors is an integer number (321026814).

Almost surely, 2^642053627 is an apocalyptic number.

642053627 is a deficient number, since it is larger than the sum of its proper divisors (1).

642053627 is an equidigital number, since it uses as much as digits as its factorization.

642053627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 642053627 is about 25338.7771409751. Note that the first 3 decimals coincide. The cubic root of 642053627 is about 862.6946429575.

The spelling of 642053627 in words is "six hundred forty-two million, fifty-three thousand, six hundred twenty-seven".