612232697209 has 9 divisors (see below), whose sum is σ = 712195427397. Its totient is φ = 524766188604.

The previous prime is 612232697189. The next prime is 612232697347. The reversal of 612232697209 is 902796232216.

The square root of 612232697209 is 782453.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 612232697209 - 2¹¹ = 612232695161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612232997209) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5421282 + ... + 5533060.

Almost surely, 2^612232697209 is an apocalyptic number.

612232697209 is the 782453-rd square number.

612232697209 is the 391227-th centered octagonal number.

It is an amenable number.

612232697209 is a deficient number, since it is larger than the sum of its proper divisors (99962730188).

612232697209 is an frugal number, since it uses more digits than its factorization.

612232697209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223572 (or 111786 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

Multiplying 612232697209 by its sum of digits (49), we get a square (29999402163241 = 5477171²).

612232697209 divided by its sum of digits (49) gives a square (12494544841 = 111779²).

The spelling of 612232697209 in words is "six hundred twelve billion, two hundred thirty-two million, six hundred ninety-seven thousand, two hundred nine".