85782919 has 2 divisors, whose sum is σ = 85782920. Its totient is φ = 85782918.

The previous prime is 85782889. The next prime is 85782923. The reversal of 85782919 is 91928758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85782919 - 2⁷ = 85782791 is a prime.

It is a super-2 number, since 2×85782919² = 14717418384321122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85782989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42891459 + 42891460.

It is an arithmetic number, because the mean of its divisors is an integer number (42891460).

Almost surely, 2^85782919 is an apocalyptic number.

85782919 is a deficient number, since it is larger than the sum of its proper divisors (1).

85782919 is an equidigital number, since it uses as much as digits as its factorization.

85782919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 49.

The square root of 85782919 is about 9261.9068770961. The cubic root of 85782919 is about 441.0287892792.

The spelling of 85782919 in words is "eighty-five million, seven hundred eighty-two thousand, nine hundred nineteen".