817213601 has 4 divisors (see below), whose sum is σ = 827059632. Its totient is φ = 807367572.

The previous prime is 817213583. The next prime is 817213603. The reversal of 817213601 is 106312718.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-817213601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (817213603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4922891 + ... + 4923056.

It is an arithmetic number, because the mean of its divisors is an integer number (206764908).

Almost surely, 2^817213601 is an apocalyptic number.

It is an amenable number.

817213601 is a deficient number, since it is larger than the sum of its proper divisors (9846031).

817213601 is an equidigital number, since it uses as much as digits as its factorization.

817213601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9846030.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 817213601 is about 28586.9480882447. The cubic root of 817213601 is about 934.9287794989.

The spelling of 817213601 in words is "eight hundred seventeen million, two hundred thirteen thousand, six hundred one".