612789893 has 4 divisors (see below), whose sum is σ = 629351820. Its totient is φ = 596227968.

The previous prime is 612789889. The next prime is 612789917. The reversal of 612789893 is 398987216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 443607844 + 169182049 = 21062^2 + 13007^2 .

It is a cyclic number.

It is not a de Polignac number, because 612789893 - 2² = 612789889 is a prime.

It is a super-2 number, since 2×612789893² = 751022905925902898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612789823) 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, 8280908 + ... + 8280981.

It is an arithmetic number, because the mean of its divisors is an integer number (157337955).

Almost surely, 2^612789893 is an apocalyptic number.

It is an amenable number.

612789893 is a deficient number, since it is larger than the sum of its proper divisors (16561927).

612789893 is a wasteful number, since it uses less digits than its factorization.

612789893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561926.

The product of its digits is 1306368, while the sum is 53.

The square root of 612789893 is about 24754.5933717361. The cubic root of 612789893 is about 849.3835867694.

The spelling of 612789893 in words is "six hundred twelve million, seven hundred eighty-nine thousand, eight hundred ninety-three".