85742719 has 2 divisors, whose sum is σ = 85742720. Its totient is φ = 85742718.

The previous prime is 85742717. The next prime is 85742743. The reversal of 85742719 is 91724758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85742719 - 2¹ = 85742717 is a prime.

It is a super-2 number, since 2×85742719² = 14703627723025922, which contains 22 as substring.

Together with 85742717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85742717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42871359 + 42871360.

It is an arithmetic number, because the mean of its divisors is an integer number (42871360).

Almost surely, 2^85742719 is an apocalyptic number.

85742719 is a deficient number, since it is larger than the sum of its proper divisors (1).

85742719 is an equidigital number, since it uses as much as digits as its factorization.

85742719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 85742719 is about 9259.7364433336. The cubic root of 85742719 is about 440.9598861777.

The spelling of 85742719 in words is "eighty-five million, seven hundred forty-two thousand, seven hundred nineteen".