42439087 has 2 divisors, whose sum is σ = 42439088. Its totient is φ = 42439086.

The previous prime is 42439079. The next prime is 42439091. The reversal of 42439087 is 78093424.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42439087 - 2³ = 42439079 is a prime.

It is a super-2 number, since 2×42439087² = 3602152210787138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42439057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21219543 + 21219544.

It is an arithmetic number, because the mean of its divisors is an integer number (21219544).

Almost surely, 2^42439087 is an apocalyptic number.

42439087 is a deficient number, since it is larger than the sum of its proper divisors (1).

42439087 is an equidigital number, since it uses as much as digits as its factorization.

42439087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 42439087 is about 6514.5289161995. The cubic root of 42439087 is about 348.8097994005.

The spelling of 42439087 in words is "forty-two million, four hundred thirty-nine thousand, eighty-seven".