2972729 has 2 divisors, whose sum is σ = 2972730. Its totient is φ = 2972728.

The previous prime is 2972701. The next prime is 2972731. The reversal of 2972729 is 9272792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1817104 + 1155625 = 1348^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 2972729 - 2¹⁶ = 2907193 is a prime.

Together with 2972731, 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 = 2972692 and 2972701.

It is not a weakly prime, because it can be changed into another prime (2972789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1486364 + 1486365.

It is an arithmetic number, because the mean of its divisors is an integer number (1486365).

2^2972729 is an apocalyptic number.

It is an amenable number.

2972729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2972729 is an equidigital number, since it uses as much as digits as its factorization.

2972729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 2972729 is about 1724.1603753712. The cubic root of 2972729 is about 143.7866084456.

The spelling of 2972729 in words is "two million, nine hundred seventy-two thousand, seven hundred twenty-nine".