83077905509 has 2 divisors, whose sum is σ = 83077905510. Its totient is φ = 83077905508.

The previous prime is 83077905451. The next prime is 83077905551. The reversal of 83077905509 is 90550977038.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76644261409 + 6433644100 = 276847^2 + 80210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83077905509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83077907509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41538952754 + 41538952755.

It is an arithmetic number, because the mean of its divisors is an integer number (41538952755).

Almost surely, 2^83077905509 is an apocalyptic number.

It is an amenable number.

83077905509 is a deficient number, since it is larger than the sum of its proper divisors (1).

83077905509 is an equidigital number, since it uses as much as digits as its factorization.

83077905509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2381400, while the sum is 53.

The spelling of 83077905509 in words is "eighty-three billion, seventy-seven million, nine hundred five thousand, five hundred nine".