83742600287509 has 2 divisors, whose sum is σ = 83742600287510. Its totient is φ = 83742600287508.

The previous prime is 83742600287501. The next prime is 83742600287603. The reversal of 83742600287509 is 90578200624738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70985309377284 + 12757290910225 = 8425278^2 + 3571735^2 .

It is a cyclic number.

It is not a de Polignac number, because 83742600287509 - 2³ = 83742600287501 is a prime.

It is a super-2 number, since 2×83742600287509² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83742600287501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41871300143754 + 41871300143755.

It is an arithmetic number, because the mean of its divisors is an integer number (41871300143755).

Almost surely, 2^{83742600287509} is an apocalyptic number.

It is an amenable number.

83742600287509 is a deficient number, since it is larger than the sum of its proper divisors (1).

83742600287509 is an equidigital number, since it uses as much as digits as its factorization.

83742600287509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40642560, while the sum is 61.

The spelling of 83742600287509 in words is "eighty-three trillion, seven hundred forty-two billion, six hundred million, two hundred eighty-seven thousand, five hundred nine".