85078919 has 4 divisors (see below), whose sum is σ = 85453944. Its totient is φ = 84703896.

The previous prime is 85078907. The next prime is 85078921. The reversal of 85078919 is 91987058.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85078919 - 2¹² = 85074823 is a prime.

It is a super-2 number, since 2×85078919² = 14476844916417122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85071919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187172 + ... + 187625.

It is an arithmetic number, because the mean of its divisors is an integer number (21363486).

Almost surely, 2^85078919 is an apocalyptic number.

85078919 is a deficient number, since it is larger than the sum of its proper divisors (375025).

85078919 is a wasteful number, since it uses less digits than its factorization.

85078919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375024.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 85078919 is about 9223.8234480068. The cubic root of 85078919 is about 439.8190009674.

The spelling of 85078919 in words is "eighty-five million, seventy-eight thousand, nine hundred nineteen".