42377639 has 4 divisors (see below), whose sum is σ = 42438120. Its totient is φ = 42317160.

The previous prime is 42377633. The next prime is 42377659. The reversal of 42377639 is 93677324.

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

It is a cyclic number.

It is not a de Polignac number, because 42377639 - 2⁴ = 42377623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42377596 and 42377605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42377633) 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, 29177 + ... + 30594.

It is an arithmetic number, because the mean of its divisors is an integer number (10609530).

Almost surely, 2^42377639 is an apocalyptic number.

42377639 is a deficient number, since it is larger than the sum of its proper divisors (60481).

42377639 is an equidigital number, since it uses as much as digits as its factorization.

42377639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60480.

The product of its digits is 190512, while the sum is 41.

The square root of 42377639 is about 6509.8109803588. The cubic root of 42377639 is about 348.6413696260.

The spelling of 42377639 in words is "forty-two million, three hundred seventy-seven thousand, six hundred thirty-nine".