835816997 has 4 divisors (see below), whose sum is σ = 835985580. Its totient is φ = 835648416.

The previous prime is 835816991. The next prime is 835816999. The reversal of 835816997 is 799618538.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 799618538 = 2 ⋅399809269.

It can be written as a sum of positive squares in 2 ways, for example, as 138909796 + 696907201 = 11786^2 + 26399^2 .

It is a cyclic number.

It is not a de Polignac number, because 835816997 - 2⁴ = 835816981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (835816991) 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, 76622 + ... + 86847.

It is an arithmetic number, because the mean of its divisors is an integer number (208996395).

Almost surely, 2^835816997 is an apocalyptic number.

It is an amenable number.

835816997 is a deficient number, since it is larger than the sum of its proper divisors (168583).

835816997 is a wasteful number, since it uses less digits than its factorization.

835816997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168582.

The product of its digits is 3265920, while the sum is 56.

The square root of 835816997 is about 28910.4997708445. The cubic root of 835816997 is about 941.9699884357.

The spelling of 835816997 in words is "eight hundred thirty-five million, eight hundred sixteen thousand, nine hundred ninety-seven".