8938729 has 2 divisors, whose sum is σ = 8938730. Its totient is φ = 8938728.

The previous prime is 8938693. The next prime is 8938739. The reversal of 8938729 is 9278398.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7371225 + 1567504 = 2715^2 + 1252^2 .

It is a cyclic number.

It is not a de Polignac number, because 8938729 - 2⁹ = 8938217 is a prime.

It is a super-2 number, since 2×8938729² = 159801752270882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8938739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4469364 + 4469365.

It is an arithmetic number, because the mean of its divisors is an integer number (4469365).

Almost surely, 2^8938729 is an apocalyptic number.

It is an amenable number.

8938729 is a deficient number, since it is larger than the sum of its proper divisors (1).

8938729 is an equidigital number, since it uses as much as digits as its factorization.

8938729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 8938729 is about 2989.7707269956. The cubic root of 8938729 is about 207.5352744018.

The spelling of 8938729 in words is "eight million, nine hundred thirty-eight thousand, seven hundred twenty-nine".