85730999 has 2 divisors, whose sum is σ = 85731000. Its totient is φ = 85730998.

The previous prime is 85730977. The next prime is 85731001. The reversal of 85730999 is 99903758.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85730999 is a prime.

Together with 85731001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85730399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42865499 + 42865500.

It is an arithmetic number, because the mean of its divisors is an integer number (42865500).

Almost surely, 2^85730999 is an apocalyptic number.

85730999 is a deficient number, since it is larger than the sum of its proper divisors (1).

85730999 is an equidigital number, since it uses as much as digits as its factorization.

85730999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 85730999 is about 9259.1035743208. The cubic root of 85730999 is about 440.9397939553.

The spelling of 85730999 in words is "eighty-five million, seven hundred thirty thousand, nine hundred ninety-nine".