42636677 has 2 divisors, whose sum is σ = 42636678. Its totient is φ = 42636676.

The previous prime is 42636673. The next prime is 42636683. The reversal of 42636677 is 77663624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42627841 + 8836 = 6529^2 + 94^2 .

It is a cyclic number.

It is not a de Polignac number, because 42636677 - 2² = 42636673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42636673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21318338 + 21318339.

It is an arithmetic number, because the mean of its divisors is an integer number (21318339).

Almost surely, 2^42636677 is an apocalyptic number.

It is an amenable number.

42636677 is a deficient number, since it is larger than the sum of its proper divisors (1).

42636677 is an equidigital number, since it uses as much as digits as its factorization.

42636677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 41.

The square root of 42636677 is about 6529.6766382417. The cubic root of 42636677 is about 349.3502967462.

The spelling of 42636677 in words is "forty-two million, six hundred thirty-six thousand, six hundred seventy-seven".