85504919 has 2 divisors, whose sum is σ = 85504920. Its totient is φ = 85504918.

The previous prime is 85504901. The next prime is 85504949. The reversal of 85504919 is 91940558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85504919 - 2¹⁶ = 85439383 is a prime.

It is a super-2 number, since 2×85504919² = 14622182346393122, 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 (85504949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42752459 + 42752460.

It is an arithmetic number, because the mean of its divisors is an integer number (42752460).

Almost surely, 2^85504919 is an apocalyptic number.

85504919 is a deficient number, since it is larger than the sum of its proper divisors (1).

85504919 is an equidigital number, since it uses as much as digits as its factorization.

85504919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 85504919 is about 9246.8869896847. The cubic root of 85504919 is about 440.5518540553.

The spelling of 85504919 in words is "eighty-five million, five hundred four thousand, nine hundred nineteen".