42736087309 has 2 divisors, whose sum is σ = 42736087310. Its totient is φ = 42736087308.

The previous prime is 42736087223. The next prime is 42736087327. The reversal of 42736087309 is 90378063724.

42736087309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23036561284 + 19699526025 = 151778^2 + 140355^2 .

It is a cyclic number.

It is not a de Polignac number, because 42736087309 - 2¹³ = 42736079117 is a prime.

It is a super-2 number, since 2×42736087309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42736087369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21368043654 + 21368043655.

It is an arithmetic number, because the mean of its divisors is an integer number (21368043655).

Almost surely, 2^42736087309 is an apocalyptic number.

It is an amenable number.

42736087309 is a deficient number, since it is larger than the sum of its proper divisors (1).

42736087309 is an equidigital number, since it uses as much as digits as its factorization.

42736087309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 42736087309 in words is "forty-two billion, seven hundred thirty-six million, eighty-seven thousand, three hundred nine".