42644603 has 2 divisors, whose sum is σ = 42644604. Its totient is φ = 42644602.

The previous prime is 42644597. The next prime is 42644611. The reversal of 42644603 is 30644624.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42644603 is a prime.

It is not a weakly prime, because it can be changed into another prime (42644663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21322301 + 21322302.

It is an arithmetic number, because the mean of its divisors is an integer number (21322302).

Almost surely, 2^42644603 is an apocalyptic number.

42644603 is a deficient number, since it is larger than the sum of its proper divisors (1).

42644603 is an equidigital number, since it uses as much as digits as its factorization.

42644603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 42644603 is about 6530.2835313637. The cubic root of 42644603 is about 349.3719430461.

The spelling of 42644603 in words is "forty-two million, six hundred forty-four thousand, six hundred three".