82139537 has 2 divisors, whose sum is σ = 82139538. Its totient is φ = 82139536.

The previous prime is 82139507. The next prime is 82139567. The reversal of 82139537 is 73593128.

It is a balanced prime because it is at equal distance from previous prime (82139507) and next prime (82139567).

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 13845841 = 8264^2 + 3721^2 .

It is a cyclic number.

It is not a de Polignac number, because 82139537 - 2¹² = 82135441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82139537.

It is not a weakly prime, because it can be changed into another prime (82139507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41069768 + 41069769.

It is an arithmetic number, because the mean of its divisors is an integer number (41069769).

Almost surely, 2^82139537 is an apocalyptic number.

It is an amenable number.

82139537 is a deficient number, since it is larger than the sum of its proper divisors (1).

82139537 is an equidigital number, since it uses as much as digits as its factorization.

82139537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 82139537 is about 9063.0865051593. The cubic root of 82139537 is about 434.6944381613.

The spelling of 82139537 in words is "eighty-two million, one hundred thirty-nine thousand, five hundred thirty-seven".