612672217 has 4 divisors (see below), whose sum is σ = 612758196. Its totient is φ = 612586240.

The previous prime is 612672211. The next prime is 612672223. The reversal of 612672217 is 712276216.

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

It is an interprime number because it is at equal distance from previous prime (612672211) and next prime (612672223).

It can be written as a sum of positive squares in 2 ways, for example, as 331640521 + 281031696 = 18211^2 + 16764^2 .

It is a cyclic number.

It is not a de Polignac number, because 612672217 - 2¹¹ = 612670169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612672211) 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, 31228 + ... + 46909.

It is an arithmetic number, because the mean of its divisors is an integer number (153189549).

Almost surely, 2^612672217 is an apocalyptic number.

It is an amenable number.

612672217 is a deficient number, since it is larger than the sum of its proper divisors (85979).

612672217 is an equidigital number, since it uses as much as digits as its factorization.

612672217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85978.

The product of its digits is 14112, while the sum is 34.

The square root of 612672217 is about 24752.2164058090. The cubic root of 612672217 is about 849.3292133413.

The spelling of 612672217 in words is "six hundred twelve million, six hundred seventy-two thousand, two hundred seventeen".