85262819 has 2 divisors, whose sum is σ = 85262820. Its totient is φ = 85262818.

The previous prime is 85262809. The next prime is 85262831. The reversal of 85262819 is 91826258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85262819 - 2⁸ = 85262563 is a prime.

It is a super-2 number, since 2×85262819² = 14539496607653522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (85262809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42631409 + 42631410.

It is an arithmetic number, because the mean of its divisors is an integer number (42631410).

Almost surely, 2^85262819 is an apocalyptic number.

85262819 is a deficient number, since it is larger than the sum of its proper divisors (1).

85262819 is an equidigital number, since it uses as much as digits as its factorization.

85262819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 41.

The square root of 85262819 is about 9233.7868179853. The cubic root of 85262819 is about 440.1356658103.

The spelling of 85262819 in words is "eighty-five million, two hundred sixty-two thousand, eight hundred nineteen".