816940693 has 8 divisors (see below), whose sum is σ = 825953408. Its totient is φ = 807940224.

The previous prime is 816940673. The next prime is 816940717. The reversal of 816940693 is 396049618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 816940693 - 2⁹ = 816940181 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 (816940603) 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 7 ways as a sum of consecutive naturals, for example, 211780 + ... + 215602.

It is an arithmetic number, because the mean of its divisors is an integer number (103244176).

Almost surely, 2^816940693 is an apocalyptic number.

It is an amenable number.

816940693 is a deficient number, since it is larger than the sum of its proper divisors (9012715).

816940693 is a wasteful number, since it uses less digits than its factorization.

816940693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 816940693 is about 28582.1743924426. The cubic root of 816940693 is about 934.8246949403.

The spelling of 816940693 in words is "eight hundred sixteen million, nine hundred forty thousand, six hundred ninety-three".