9418729 has 2 divisors, whose sum is σ = 9418730. Its totient is φ = 9418728.

The previous prime is 9418727. The next prime is 9418733. The reversal of 9418729 is 9278149.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5071504 + 4347225 = 2252^2 + 2085^2 .

It is an emirp because it is prime and its reverse (9278149) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9418729 - 2¹ = 9418727 is a prime.

Together with 9418727, it forms a pair of twin primes.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 9418691 and 9418700.

It is not a weakly prime, because it can be changed into another prime (9418727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4709364 + 4709365.

It is an arithmetic number, because the mean of its divisors is an integer number (4709365).

Almost surely, 2^9418729 is an apocalyptic number.

It is an amenable number.

9418729 is a deficient number, since it is larger than the sum of its proper divisors (1).

9418729 is an equidigital number, since it uses as much as digits as its factorization.

9418729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 9418729 is about 3068.9947865710. The cubic root of 9418729 is about 211.1855020585.

The spelling of 9418729 in words is "nine million, four hundred eighteen thousand, seven hundred twenty-nine".