2987729 has 2 divisors, whose sum is σ = 2987730. Its totient is φ = 2987728.

The previous prime is 2987707. The next prime is 2987737. The reversal of 2987729 is 9277892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2310400 + 677329 = 1520^2 + 823^2 .

It is a cyclic number.

It is not a de Polignac number, because 2987729 - 2⁸ = 2987473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2987729.

It is not a weakly prime, because it can be changed into another prime (2987429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1493864 + 1493865.

It is an arithmetic number, because the mean of its divisors is an integer number (1493865).

2^2987729 is an apocalyptic number.

It is an amenable number.

2987729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2987729 is an equidigital number, since it uses as much as digits as its factorization.

2987729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 2987729 is about 1728.5048452347. The cubic root of 2987729 is about 144.0280455920.

The spelling of 2987729 in words is "two million, nine hundred eighty-seven thousand, seven hundred twenty-nine".