85351691 has 2 divisors, whose sum is σ = 85351692. Its totient is φ = 85351690.

The previous prime is 85351681. The next prime is 85351723. The reversal of 85351691 is 19615358.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85351691 - 2¹⁴ = 85335307 is a prime.

It is a super-2 number, since 2×85351691² = 14569822313118962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85351601) 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, 42675845 + 42675846.

It is an arithmetic number, because the mean of its divisors is an integer number (42675846).

Almost surely, 2^85351691 is an apocalyptic number.

85351691 is a deficient number, since it is larger than the sum of its proper divisors (1).

85351691 is an equidigital number, since it uses as much as digits as its factorization.

85351691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 85351691 is about 9238.5978914552. The cubic root of 85351691 is about 440.2885349222.

The spelling of 85351691 in words is "eighty-five million, three hundred fifty-one thousand, six hundred ninety-one".