42839449 has 2 divisors, whose sum is σ = 42839450. Its totient is φ = 42839448.

The previous prime is 42839431. The next prime is 42839477. The reversal of 42839449 is 94493824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29648025 + 13191424 = 5445^2 + 3632^2 .

It is a cyclic number.

It is not a de Polignac number, because 42839449 - 2¹⁷ = 42708377 is a prime.

It is not a weakly prime, because it can be changed into another prime (42839479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21419724 + 21419725.

It is an arithmetic number, because the mean of its divisors is an integer number (21419725).

Almost surely, 2^42839449 is an apocalyptic number.

It is an amenable number.

42839449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42839449 is an equidigital number, since it uses as much as digits as its factorization.

42839449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 42839449 is about 6545.1851769068. The cubic root of 42839449 is about 349.9032358352.

The spelling of 42839449 in words is "forty-two million, eight hundred thirty-nine thousand, four hundred forty-nine".