42706687 has 2 divisors, whose sum is σ = 42706688. Its totient is φ = 42706686.

The previous prime is 42706673. The next prime is 42706693. The reversal of 42706687 is 78660724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42706687 - 2¹⁵ = 42673919 is a prime.

It is a super-2 number, since 2×42706687² = 3647722229031938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42706637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21353343 + 21353344.

It is an arithmetic number, because the mean of its divisors is an integer number (21353344).

Almost surely, 2^42706687 is an apocalyptic number.

42706687 is a deficient number, since it is larger than the sum of its proper divisors (1).

42706687 is an equidigital number, since it uses as much as digits as its factorization.

42706687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 42706687 is about 6535.0353480299. The cubic root of 42706687 is about 349.5414048202.

The spelling of 42706687 in words is "forty-two million, seven hundred six thousand, six hundred eighty-seven".