612816847 has 4 divisors (see below), whose sum is σ = 613861416. Its totient is φ = 611772280.

The previous prime is 612816839. The next prime is 612816851. The reversal of 612816847 is 748618216.

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 612816847 - 2³ = 612816839 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 (612816817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521404 + ... + 522577.

It is an arithmetic number, because the mean of its divisors is an integer number (153465354).

Almost surely, 2^612816847 is an apocalyptic number.

612816847 is a deficient number, since it is larger than the sum of its proper divisors (1044569).

612816847 is a wasteful number, since it uses less digits than its factorization.

612816847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044568.

The product of its digits is 129024, while the sum is 43.

The square root of 612816847 is about 24755.1377899619. The cubic root of 612816847 is about 849.3960401676.

The spelling of 612816847 in words is "six hundred twelve million, eight hundred sixteen thousand, eight hundred forty-seven".