85699643 has 2 divisors, whose sum is σ = 85699644. Its totient is φ = 85699642.

The previous prime is 85699583. The next prime is 85699657. The reversal of 85699643 is 34699658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85699643 - 2¹⁴ = 85683259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85699591 and 85699600.

It is not a weakly prime, because it can be changed into another prime (85699673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42849821 + 42849822.

It is an arithmetic number, because the mean of its divisors is an integer number (42849822).

Almost surely, 2^85699643 is an apocalyptic number.

85699643 is a deficient number, since it is larger than the sum of its proper divisors (1).

85699643 is an equidigital number, since it uses as much as digits as its factorization.

85699643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 50.

The square root of 85699643 is about 9257.4101669960. The cubic root of 85699643 is about 440.8860296837.

The spelling of 85699643 in words is "eighty-five million, six hundred ninety-nine thousand, six hundred forty-three".