2387729 has 2 divisors, whose sum is σ = 2387730. Its totient is φ = 2387728.

The previous prime is 2387687. The next prime is 2387753. The reversal of 2387729 is 9277832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2371600 + 16129 = 1540^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 2387729 - 2¹⁶ = 2322193 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2387692 and 2387701.

It is not a weakly prime, because it can be changed into another prime (2387629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1193864 + 1193865.

It is an arithmetic number, because the mean of its divisors is an integer number (1193865).

2^2387729 is an apocalyptic number.

It is an amenable number.

2387729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2387729 is an equidigital number, since it uses as much as digits as its factorization.

2387729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 2387729 is about 1545.2278149192. The cubic root of 2387729 is about 133.6580163541.

The spelling of 2387729 in words is "two million, three hundred eighty-seven thousand, seven hundred twenty-nine".