85297798 has 4 divisors (see below), whose sum is σ = 127946700. Its totient is φ = 42648898.

The previous prime is 85297781. The next prime is 85297811. The reversal of 85297798 is 89779258.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21324448 + ... + 21324451.

It is an arithmetic number, because the mean of its divisors is an integer number (31986675).

Almost surely, 2^85297798 is an apocalyptic number.

85297798 is a deficient number, since it is larger than the sum of its proper divisors (42648902).

85297798 is a wasteful number, since it uses less digits than its factorization.

85297798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42648901.

The product of its digits is 2540160, while the sum is 55.

The square root of 85297798 is about 9235.6807004140. The cubic root of 85297798 is about 440.1958460107.

The spelling of 85297798 in words is "eighty-five million, two hundred ninety-seven thousand, seven hundred ninety-eight".