816427147 has 4 divisors (see below), whose sum is σ = 823652280. Its totient is φ = 809202016.

The previous prime is 816427133. The next prime is 816427181. The reversal of 816427147 is 741724618.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 816427147 - 2¹⁵ = 816394379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816427127) 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, 3612397 + ... + 3612622.

It is an arithmetic number, because the mean of its divisors is an integer number (205913070).

Almost surely, 2^816427147 is an apocalyptic number.

816427147 is a deficient number, since it is larger than the sum of its proper divisors (7225133).

816427147 is a wasteful number, since it uses less digits than its factorization.

816427147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7225132.

The product of its digits is 75264, while the sum is 40.

The square root of 816427147 is about 28573.1893039612. The cubic root of 816427147 is about 934.6287704310.

The spelling of 816427147 in words is "eight hundred sixteen million, four hundred twenty-seven thousand, one hundred forty-seven".