42008240137 has 2 divisors, whose sum is σ = 42008240138. Its totient is φ = 42008240136.

The previous prime is 42008240119. The next prime is 42008240147. The reversal of 42008240137 is 73104280024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33657204681 + 8351035456 = 183459^2 + 91384^2 .

It is a cyclic number.

It is not a de Polignac number, because 42008240137 - 2¹¹ = 42008238089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42008240099 and 42008240108.

It is not a weakly prime, because it can be changed into another prime (42008240107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21004120068 + 21004120069.

It is an arithmetic number, because the mean of its divisors is an integer number (21004120069).

Almost surely, 2^42008240137 is an apocalyptic number.

It is an amenable number.

42008240137 is a deficient number, since it is larger than the sum of its proper divisors (1).

42008240137 is an equidigital number, since it uses as much as digits as its factorization.

42008240137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 42008240137 in words is "forty-two billion, eight million, two hundred forty thousand, one hundred thirty-seven".