85001997 has 16 divisors (see below), whose sum is σ = 118494720. Its totient is φ = 54098352.

The previous prime is 85001963. The next prime is 85001999. The reversal of 85001997 is 79910058.

It is a happy number.

It is not a de Polignac number, because 85001997 - 2⁶ = 85001933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85001999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50158 + ... + 51824.

It is an arithmetic number, because the mean of its divisors is an integer number (7405920).

Almost surely, 2^85001997 is an apocalyptic number.

It is an amenable number.

85001997 is a deficient number, since it is larger than the sum of its proper divisors (33492723).

85001997 is a wasteful number, since it uses less digits than its factorization.

85001997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 85001997 is about 9219.6527591878. The cubic root of 85001997 is about 439.6864105100.

It can be divided in two parts, 8 and 5001997, that added together give a palindrome (5002005).

The spelling of 85001997 in words is "eighty-five million, one thousand, nine hundred ninety-seven".