42539963 has 4 divisors (see below), whose sum is σ = 42590688. Its totient is φ = 42489240.

The previous prime is 42539957. The next prime is 42539969. The reversal of 42539963 is 36993524.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42539957) and next prime (42539969).

It is a cyclic number.

It is not a de Polignac number, because 42539963 - 2¹⁶ = 42474427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42539963.

It is not an unprimeable number, because it can be changed into a prime (42539969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24083 + ... + 25788.

It is an arithmetic number, because the mean of its divisors is an integer number (10647672).

Almost surely, 2^42539963 is an apocalyptic number.

42539963 is a deficient number, since it is larger than the sum of its proper divisors (50725).

42539963 is an equidigital number, since it uses as much as digits as its factorization.

42539963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50724.

The product of its digits is 174960, while the sum is 41.

The square root of 42539963 is about 6522.2667072115. The cubic root of 42539963 is about 349.0859496633.

The spelling of 42539963 in words is "forty-two million, five hundred thirty-nine thousand, nine hundred sixty-three".