99985001 has 4 divisors (see below), whose sum is σ = 100503252. Its totient is φ = 99466752.

The previous prime is 99984991. The next prime is 99985009. The reversal of 99985001 is 10058999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10058999 = 19 ⋅529421.

It can be written as a sum of positive squares in 2 ways, for example, as 58369600 + 41615401 = 7640^2 + 6451^2 .

It is a cyclic number.

It is not a de Polignac number, because 99985001 - 2²² = 95790697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99985001.

It is not an unprimeable number, because it can be changed into a prime (99985009) 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, 258836 + ... + 259221.

It is an arithmetic number, because the mean of its divisors is an integer number (25125813).

Almost surely, 2^99985001 is an apocalyptic number.

It is an amenable number.

99985001 is a deficient number, since it is larger than the sum of its proper divisors (518251).

99985001 is a wasteful number, since it uses less digits than its factorization.

99985001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518250.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 99985001 is about 9999.2500218766. The cubic root of 99985001 is about 464.1356758040.

The spelling of 99985001 in words is "ninety-nine million, nine hundred eighty-five thousand, one".