85111919 has 2 divisors, whose sum is σ = 85111920. Its totient is φ = 85111918.

The previous prime is 85111907. The next prime is 85111927. The reversal of 85111919 is 91911158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85111919 - 2⁴ = 85111903 is a prime.

It is a super-2 number, since 2×85111919² = 14488077511725122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85111619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42555959 + 42555960.

It is an arithmetic number, because the mean of its divisors is an integer number (42555960).

Almost surely, 2^85111919 is an apocalyptic number.

85111919 is a deficient number, since it is larger than the sum of its proper divisors (1).

85111919 is an equidigital number, since it uses as much as digits as its factorization.

85111919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 35.

The square root of 85111919 is about 9225.6121206129. The cubic root of 85111919 is about 439.8758585731.

The spelling of 85111919 in words is "eighty-five million, one hundred eleven thousand, nine hundred nineteen".