642052403 has 2 divisors, whose sum is σ = 642052404. Its totient is φ = 642052402.

The previous prime is 642052343. The next prime is 642052417. The reversal of 642052403 is 304250246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642052403 - 2⁶ = 642052339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (642052423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321026201 + 321026202.

It is an arithmetic number, because the mean of its divisors is an integer number (321026202).

Almost surely, 2^642052403 is an apocalyptic number.

642052403 is a deficient number, since it is larger than the sum of its proper divisors (1).

642052403 is an equidigital number, since it uses as much as digits as its factorization.

642052403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 642052403 is about 25338.7529882589. The cubic root of 642052403 is about 862.6940947484.

The spelling of 642052403 in words is "six hundred forty-two million, fifty-two thousand, four hundred three".