8740729 has 4 divisors (see below), whose sum is σ = 9022720. Its totient is φ = 8458740.

The previous prime is 8740727. The next prime is 8740757. The reversal of 8740729 is 9270478.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8740729 - 2¹ = 8740727 is a prime.

It is a Duffinian number.

8740729 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8740727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140949 + ... + 141010.

It is an arithmetic number, because the mean of its divisors is an integer number (2255680).

Almost surely, 2^8740729 is an apocalyptic number.

It is an amenable number.

8740729 is a deficient number, since it is larger than the sum of its proper divisors (281991).

8740729 is a wasteful number, since it uses less digits than its factorization.

8740729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281990.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 8740729 is about 2956.4723912122. The cubic root of 8740729 is about 205.9914612981.

The spelling of 8740729 in words is "eight million, seven hundred forty thousand, seven hundred twenty-nine".