42827639 has 2 divisors, whose sum is σ = 42827640. Its totient is φ = 42827638.

The previous prime is 42827627. The next prime is 42827663. The reversal of 42827639 is 93672824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42827639 - 2⁸ = 42827383 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42827596 and 42827605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42827689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21413819 + 21413820.

It is an arithmetic number, because the mean of its divisors is an integer number (21413820).

Almost surely, 2^42827639 is an apocalyptic number.

42827639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42827639 is an equidigital number, since it uses as much as digits as its factorization.

42827639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 42827639 is about 6544.2829248131. The cubic root of 42827639 is about 349.8710790490.

The spelling of 42827639 in words is "forty-two million, eight hundred twenty-seven thousand, six hundred thirty-nine".