42556963 has 2 divisors, whose sum is σ = 42556964. Its totient is φ = 42556962.

The previous prime is 42556961. The next prime is 42556999. The reversal of 42556963 is 36965524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42556963 - 2¹ = 42556961 is a prime.

It is a super-2 number, since 2×42556963² = 3622190199566738, which contains 22 as substring.

Together with 42556961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42556961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21278481 + 21278482.

It is an arithmetic number, because the mean of its divisors is an integer number (21278482).

Almost surely, 2^42556963 is an apocalyptic number.

42556963 is a deficient number, since it is larger than the sum of its proper divisors (1).

42556963 is an equidigital number, since it uses as much as digits as its factorization.

42556963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 40.

The square root of 42556963 is about 6523.5698049458. The cubic root of 42556963 is about 349.1324445384.

The spelling of 42556963 in words is "forty-two million, five hundred fifty-six thousand, nine hundred sixty-three".