85078549 has 2 divisors, whose sum is σ = 85078550. Its totient is φ = 85078548.

The previous prime is 85078529. The next prime is 85078673. The reversal of 85078549 is 94587058.

85078549 is nontrivially palindromic in base 16.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43797924 + 41280625 = 6618^2 + 6425^2 .

It is a cyclic number.

It is not a de Polignac number, because 85078549 - 2⁵ = 85078517 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 85078499 and 85078508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85078529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42539274 + 42539275.

It is an arithmetic number, because the mean of its divisors is an integer number (42539275).

Almost surely, 2^85078549 is an apocalyptic number.

It is an amenable number.

85078549 is a deficient number, since it is larger than the sum of its proper divisors (1).

85078549 is an equidigital number, since it uses as much as digits as its factorization.

85078549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 85078549 is about 9223.8033912264. The cubic root of 85078549 is about 439.8183633897.

The spelling of 85078549 in words is "eighty-five million, seventy-eight thousand, five hundred forty-nine".