83705131 has 2 divisors, whose sum is σ = 83705132. Its totient is φ = 83705130.

The previous prime is 83705117. The next prime is 83705173. The reversal of 83705131 is 13150738.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83705131 - 2⁵ = 83705099 is a prime.

It is a super-2 number, since 2×83705131² = 14013097911454322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 83705131.

It is not a weakly prime, because it can be changed into another prime (83705101) 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, 41852565 + 41852566.

It is an arithmetic number, because the mean of its divisors is an integer number (41852566).

Almost surely, 2^83705131 is an apocalyptic number.

83705131 is a deficient number, since it is larger than the sum of its proper divisors (1).

83705131 is an equidigital number, since it uses as much as digits as its factorization.

83705131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 83705131 is about 9149.0508250856. The cubic root of 83705131 is about 437.4388590477.

Adding to 83705131 its reverse (13150738), we get a palindrome (96855869).

The spelling of 83705131 in words is "eighty-three million, seven hundred five thousand, one hundred thirty-one".