85827919 has 2 divisors, whose sum is σ = 85827920. Its totient is φ = 85827918.

The previous prime is 85827899. The next prime is 85827923. The reversal of 85827919 is 91972858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85827919 - 2⁵ = 85827887 is a prime.

It is a super-2 number, since 2×85827919² = 14732863359741122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85825919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42913959 + 42913960.

It is an arithmetic number, because the mean of its divisors is an integer number (42913960).

Almost surely, 2^85827919 is an apocalyptic number.

85827919 is a deficient number, since it is larger than the sum of its proper divisors (1).

85827919 is an equidigital number, since it uses as much as digits as its factorization.

85827919 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 85827919 is about 9264.3358639462. The cubic root of 85827919 is about 441.1058940861.

The spelling of 85827919 in words is "eighty-five million, eight hundred twenty-seven thousand, nine hundred nineteen".