42503939 has 2 divisors, whose sum is σ = 42503940. Its totient is φ = 42503938.

The previous prime is 42503897. The next prime is 42503941. The reversal of 42503939 is 93930524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42503939 - 2¹² = 42499843 is a prime.

Together with 42503941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42503899 and 42503908.

It is not a weakly prime, because it can be changed into another prime (42503239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21251969 + 21251970.

It is an arithmetic number, because the mean of its divisors is an integer number (21251970).

Almost surely, 2^42503939 is an apocalyptic number.

42503939 is a deficient number, since it is larger than the sum of its proper divisors (1).

42503939 is an equidigital number, since it uses as much as digits as its factorization.

42503939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 42503939 is about 6519.5045057121. The cubic root of 42503939 is about 348.9873833366.

The spelling of 42503939 in words is "forty-two million, five hundred three thousand, nine hundred thirty-nine".