816248929 has 4 divisors (see below), whose sum is σ = 817028100. Its totient is φ = 815469760.

The previous prime is 816248921. The next prime is 816248933. The reversal of 816248929 is 929842618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 929842618 = 2 ⋅464921309.

It can be written as a sum of positive squares in 2 ways, for example, as 775901025 + 40347904 = 27855^2 + 6352^2 .

It is a cyclic number.

It is not a de Polignac number, because 816248929 - 2³ = 816248921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816248921) 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, 388012 + ... + 390109.

It is an arithmetic number, because the mean of its divisors is an integer number (204257025).

Almost surely, 2^816248929 is an apocalyptic number.

It is an amenable number.

816248929 is a deficient number, since it is larger than the sum of its proper divisors (779171).

816248929 is a wasteful number, since it uses less digits than its factorization.

816248929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779170.

The product of its digits is 497664, while the sum is 49.

The square root of 816248929 is about 28570.0705109385. The cubic root of 816248929 is about 934.5607587322.

The spelling of 816248929 in words is "eight hundred sixteen million, two hundred forty-eight thousand, nine hundred twenty-nine".