85455919 has 2 divisors, whose sum is σ = 85455920. Its totient is φ = 85455918.

The previous prime is 85455899. The next prime is 85455941. The reversal of 85455919 is 91955458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85455919 - 2¹¹ = 85453871 is a prime.

It is a super-2 number, since 2×85455919² = 14605428184269122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85455989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42727959 + 42727960.

It is an arithmetic number, because the mean of its divisors is an integer number (42727960).

Almost surely, 2^85455919 is an apocalyptic number.

85455919 is a deficient number, since it is larger than the sum of its proper divisors (1).

85455919 is an equidigital number, since it uses as much as digits as its factorization.

85455919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 46.

The square root of 85455919 is about 9244.2370696559. The cubic root of 85455919 is about 440.4676828130.

The spelling of 85455919 in words is "eighty-five million, four hundred fifty-five thousand, nine hundred nineteen".