83335139977 has 2 divisors, whose sum is σ = 83335139978. Its totient is φ = 83335139976.

The previous prime is 83335139971. The next prime is 83335140029. The reversal of 83335139977 is 77993153338.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78954818121 + 4380321856 = 280989^2 + 66184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83335139977 is a prime.

It is not a weakly prime, because it can be changed into another prime (83335139971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41667569988 + 41667569989.

It is an arithmetic number, because the mean of its divisors is an integer number (41667569989).

Almost surely, 2^83335139977 is an apocalyptic number.

It is an amenable number.

83335139977 is a deficient number, since it is larger than the sum of its proper divisors (1).

83335139977 is an equidigital number, since it uses as much as digits as its factorization.

83335139977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12859560, while the sum is 58.

The spelling of 83335139977 in words is "eighty-three billion, three hundred thirty-five million, one hundred thirty-nine thousand, nine hundred seventy-seven".