85203913 has 4 divisors (see below), whose sum is σ = 86811588. Its totient is φ = 83596240.

The previous prime is 85203907. The next prime is 85203917. The reversal of 85203913 is 31930258.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31930258 = 2 ⋅15965129.

It can be written as a sum of positive squares in 2 ways, for example, as 75394489 + 9809424 = 8683^2 + 3132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85203913 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85203917) 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, 803758 + ... + 803863.

It is an arithmetic number, because the mean of its divisors is an integer number (21702897).

Almost surely, 2^85203913 is an apocalyptic number.

It is an amenable number.

85203913 is a deficient number, since it is larger than the sum of its proper divisors (1607675).

85203913 is a wasteful number, since it uses less digits than its factorization.

85203913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607674.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 85203913 is about 9230.5965679364. The cubic root of 85203913 is about 440.0342827971.

The spelling of 85203913 in words is "eighty-five million, two hundred three thousand, nine hundred thirteen".