85074709 has 2 divisors, whose sum is σ = 85074710. Its totient is φ = 85074708.

The previous prime is 85074707. The next prime is 85074721. The reversal of 85074709 is 90747058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74770609 + 10304100 = 8647^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 85074709 - 2¹ = 85074707 is a prime.

It is a super-2 number, since 2×85074709² = 14475412222869362, which contains 22 as substring.

Together with 85074707, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85074701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42537354 + 42537355.

It is an arithmetic number, because the mean of its divisors is an integer number (42537355).

Almost surely, 2^85074709 is an apocalyptic number.

It is an amenable number.

85074709 is a deficient number, since it is larger than the sum of its proper divisors (1).

85074709 is an equidigital number, since it uses as much as digits as its factorization.

85074709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 85074709 is about 9223.5952317955. The cubic root of 85074709 is about 439.8117462579.

The spelling of 85074709 in words is "eighty-five million, seventy-four thousand, seven hundred nine".