85749019 has 2 divisors, whose sum is σ = 85749020. Its totient is φ = 85749018.

The previous prime is 85749011. The next prime is 85749029. The reversal of 85749019 is 91094758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85749019 - 2³ = 85749011 is a prime.

It is a super-2 number, since 2×85749019² = 14705788518924722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85749011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42874509 + 42874510.

It is an arithmetic number, because the mean of its divisors is an integer number (42874510).

Almost surely, 2^85749019 is an apocalyptic number.

85749019 is a deficient number, since it is larger than the sum of its proper divisors (1).

85749019 is an equidigital number, since it uses as much as digits as its factorization.

85749019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 85749019 is about 9260.0766195534. The cubic root of 85749019 is about 440.9706858479.

The spelling of 85749019 in words is "eighty-five million, seven hundred forty-nine thousand, nineteen".