816685141 has 6 divisors (see below), whose sum is σ = 830300342. Its totient is φ = 803077320.

The previous prime is 816685123. The next prime is 816685147. The reversal of 816685141 is 141586618.

It can be written as a sum of positive squares in only one way, i.e., 481978116 + 334707025 = 21954^2 + 18295^2 .

It is not a de Polignac number, because 816685141 - 2⁹ = 816684629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816685094 and 816685103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816685147) 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 5 ways as a sum of consecutive naturals, for example, 221370 + ... + 225028.

Almost surely, 2^816685141 is an apocalyptic number.

It is an amenable number.

816685141 is a deficient number, since it is larger than the sum of its proper divisors (13615201).

816685141 is an frugal number, since it uses more digits than its factorization.

816685141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7379 (or 3720 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 816685141 is about 28577.7035641424. The cubic root of 816685141 is about 934.7272087796.

The spelling of 816685141 in words is "eight hundred sixteen million, six hundred eighty-five thousand, one hundred forty-one".