7429939 has 4 divisors (see below), whose sum is σ = 8105400. Its totient is φ = 6754480.

The previous prime is 7429913. The next prime is 7429951. The reversal of 7429939 is 9399247.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7429939 - 2⁵ = 7429907 is a prime.

It is a Duffinian number.

7429939 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7429895 and 7429904.

It is not an unprimeable number, because it can be changed into a prime (7429999) 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, 337714 + ... + 337735.

It is an arithmetic number, because the mean of its divisors is an integer number (2026350).

Almost surely, 2^7429939 is an apocalyptic number.

7429939 is a deficient number, since it is larger than the sum of its proper divisors (675461).

7429939 is a wasteful number, since it uses less digits than its factorization.

7429939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675460.

The product of its digits is 122472, while the sum is 43.

The square root of 7429939 is about 2725.7914447001. The cubic root of 7429939 is about 195.1319641481.

The spelling of 7429939 in words is "seven million, four hundred twenty-nine thousand, nine hundred thirty-nine".