4987729 has 2 divisors, whose sum is σ = 4987730. Its totient is φ = 4987728.

The previous prime is 4987721. The next prime is 4987769. The reversal of 4987729 is 9277894.

4987729 = T₁₈₂₂ + T₁₈₂₃ + T₁₈₂₄.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3069504 + 1918225 = 1752^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 4987729 - 2³ = 4987721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4987721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2493864 + 2493865.

It is an arithmetic number, because the mean of its divisors is an integer number (2493865).

Almost surely, 2^4987729 is an apocalyptic number.

4987729 is the 1824-th centered triangular number.

It is an amenable number.

4987729 is a deficient number, since it is larger than the sum of its proper divisors (1).

4987729 is an equidigital number, since it uses as much as digits as its factorization.

4987729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 4987729 is about 2233.3224129086. The cubic root of 4987729 is about 170.8575926419.

It can be divided in two parts, 49 and 87729, that added together give a palindrome (87778).

The spelling of 4987729 in words is "four million, nine hundred eighty-seven thousand, seven hundred twenty-nine".