612222789 has 4 divisors (see below), whose sum is σ = 816297056. Its totient is φ = 408148524.

The previous prime is 612222773. The next prime is 612222791. The reversal of 612222789 is 987222216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 612222789 - 2⁴ = 612222773 is a prime.

It is a super-4 number, since 4×612222789⁴ (a number of 36 digits) contains 4444 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 (612222889) 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, 102037129 + ... + 102037134.

It is an arithmetic number, because the mean of its divisors is an integer number (204074264).

Almost surely, 2^612222789 is an apocalyptic number.

It is an amenable number.

612222789 is a deficient number, since it is larger than the sum of its proper divisors (204074267).

612222789 is a wasteful number, since it uses less digits than its factorization.

612222789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204074266.

The product of its digits is 48384, while the sum is 39.

The square root of 612222789 is about 24743.1361997626. The cubic root of 612222789 is about 849.1214863313.

The spelling of 612222789 in words is "six hundred twelve million, two hundred twenty-two thousand, seven hundred eighty-nine".