85039970 has 16 divisors (see below), whose sum is σ = 159727680. Its totient is φ = 32536944.

The previous prime is 85039961. The next prime is 85039979. The reversal of 85039970 is 7993058.

It is an interprime number because it is at equal distance from previous prime (85039961) and next prime (85039979).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85039979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184640 + ... + 185099.

It is an arithmetic number, because the mean of its divisors is an integer number (9982980).

Almost surely, 2^85039970 is an apocalyptic number.

85039970 is a deficient number, since it is larger than the sum of its proper divisors (74687710).

85039970 is a wasteful number, since it uses less digits than its factorization.

85039970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369769.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 85039970 is about 9221.7118801229. The cubic root of 85039970 is about 439.7518745659.

The spelling of 85039970 in words is "eighty-five million, thirty-nine thousand, nine hundred seventy".