612347321 has 2 divisors, whose sum is σ = 612347322. Its totient is φ = 612347320.

The previous prime is 612347279. The next prime is 612347347. The reversal of 612347321 is 123743216.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 604618921 + 7728400 = 24589^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 612347321 - 2²⁶ = 545238457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (612340321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306173660 + 306173661.

It is an arithmetic number, because the mean of its divisors is an integer number (306173661).

Almost surely, 2^612347321 is an apocalyptic number.

It is an amenable number.

612347321 is a deficient number, since it is larger than the sum of its proper divisors (1).

612347321 is an equidigital number, since it uses as much as digits as its factorization.

612347321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 29.

The square root of 612347321 is about 24745.6525676734. The cubic root of 612347321 is about 849.1790555854.

The spelling of 612347321 in words is "six hundred twelve million, three hundred forty-seven thousand, three hundred twenty-one".