816398353 has 4 divisors (see below), whose sum is σ = 816676848. Its totient is φ = 816119860.

The previous prime is 816398329. The next prime is 816398369. The reversal of 816398353 is 353893618.

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 not a de Polignac number, because 816398353 - 2⁵ = 816398321 is a prime.

It is a super-2 number, since 2×816398353² = 1333012541562225218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816398153) 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, 134803 + ... + 140728.

It is an arithmetic number, because the mean of its divisors is an integer number (204169212).

Almost surely, 2^816398353 is an apocalyptic number.

It is an amenable number.

816398353 is a deficient number, since it is larger than the sum of its proper divisors (278495).

816398353 is a wasteful number, since it uses less digits than its factorization.

816398353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278494.

The product of its digits is 466560, while the sum is 46.

The square root of 816398353 is about 28572.6854355694. The cubic root of 816398353 is about 934.6177827116.

The spelling of 816398353 in words is "eight hundred sixteen million, three hundred ninety-eight thousand, three hundred fifty-three".