3122729 has 2 divisors, whose sum is σ = 3122730. Its totient is φ = 3122728.

The previous prime is 3122719. The next prime is 3122731. The reversal of 3122729 is 9272213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2408704 + 714025 = 1552^2 + 845^2 .

It is an emirp because it is prime and its reverse (9272213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3122729 - 2⁸ = 3122473 is a prime.

Together with 3122731, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3122698 and 3122707.

It is not a weakly prime, because it can be changed into another prime (3122719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561364 + 1561365.

It is an arithmetic number, because the mean of its divisors is an integer number (1561365).

Almost surely, 2^3122729 is an apocalyptic number.

It is an amenable number.

3122729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3122729 is an equidigital number, since it uses as much as digits as its factorization.

3122729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 3122729 is about 1767.1245004243. The cubic root of 3122729 is about 146.1654626252.

The spelling of 3122729 in words is "three million, one hundred twenty-two thousand, seven hundred twenty-nine".