42399337 has 2 divisors, whose sum is σ = 42399338. Its totient is φ = 42399336.

The previous prime is 42399307. The next prime is 42399341. The reversal of 42399337 is 73399324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 266256 = 6491^2 + 516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42399337 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42399337.

It is not a weakly prime, because it can be changed into another prime (42399307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21199668 + 21199669.

It is an arithmetic number, because the mean of its divisors is an integer number (21199669).

Almost surely, 2^42399337 is an apocalyptic number.

It is an amenable number.

42399337 is a deficient number, since it is larger than the sum of its proper divisors (1).

42399337 is an equidigital number, since it uses as much as digits as its factorization.

42399337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 40.

The square root of 42399337 is about 6511.4773285331. The cubic root of 42399337 is about 348.7008627131.

The spelling of 42399337 in words is "forty-two million, three hundred ninety-nine thousand, three hundred thirty-seven".