7408729 has 4 divisors (see below), whose sum is σ = 7442176. Its totient is φ = 7375284.

The previous prime is 7408703. The next prime is 7408733. The reversal of 7408729 is 9278047.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9278047 = 1231 ⋅7537.

It is a cyclic number.

It is not a de Polignac number, because 7408729 - 2¹⁷ = 7277657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7408789) 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, 16389 + ... + 16834.

It is an arithmetic number, because the mean of its divisors is an integer number (1860544).

Almost surely, 2^7408729 is an apocalyptic number.

It is an amenable number.

7408729 is a deficient number, since it is larger than the sum of its proper divisors (33447).

7408729 is a wasteful number, since it uses less digits than its factorization.

7408729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33446.

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

The square root of 7408729 is about 2721.8980509931. The cubic root of 7408729 is about 194.9461082720.

The spelling of 7408729 in words is "seven million, four hundred eight thousand, seven hundred twenty-nine".