85182709 has 2 divisors, whose sum is σ = 85182710. Its totient is φ = 85182708.

The previous prime is 85182697. The next prime is 85182739. The reversal of 85182709 is 90728158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81270225 + 3912484 = 9015^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 85182709 - 2¹⁵ = 85149941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85182739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42591354 + 42591355.

It is an arithmetic number, because the mean of its divisors is an integer number (42591355).

Almost surely, 2^85182709 is an apocalyptic number.

It is an amenable number.

85182709 is a deficient number, since it is larger than the sum of its proper divisors (1).

85182709 is an equidigital number, since it uses as much as digits as its factorization.

85182709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 85182709 is about 9229.4479249845. The cubic root of 85182709 is about 439.9977771926.

The spelling of 85182709 in words is "eighty-five million, one hundred eighty-two thousand, seven hundred nine".