42499339 has 2 divisors, whose sum is σ = 42499340. Its totient is φ = 42499338.

The previous prime is 42499313. The next prime is 42499349. The reversal of 42499339 is 93399424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42499339 - 2⁵ = 42499307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42499295 and 42499304.

It is not a weakly prime, because it can be changed into another prime (42499309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21249669 + 21249670.

It is an arithmetic number, because the mean of its divisors is an integer number (21249670).

Almost surely, 2^42499339 is an apocalyptic number.

42499339 is a deficient number, since it is larger than the sum of its proper divisors (1).

42499339 is an equidigital number, since it uses as much as digits as its factorization.

42499339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 42499339 is about 6519.1517086198. The cubic root of 42499339 is about 348.9747931319.

The spelling of 42499339 in words is "forty-two million, four hundred ninety-nine thousand, three hundred thirty-nine".