7730139 has 8 divisors (see below), whose sum is σ = 10755072. Its totient is φ = 4929320.

The previous prime is 7730123. The next prime is 7730147. The reversal of 7730139 is 9310377.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7730139 - 2⁴ = 7730123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7730339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55947 + ... + 56084.

It is an arithmetic number, because the mean of its divisors is an integer number (1344384).

Almost surely, 2^7730139 is an apocalyptic number.

7730139 is a deficient number, since it is larger than the sum of its proper divisors (3024933).

7730139 is a wasteful number, since it uses less digits than its factorization.

7730139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112057.

The product of its (nonzero) digits is 3969, while the sum is 30.

The square root of 7730139 is about 2780.3127521917. The cubic root of 7730139 is about 197.7253870849.

The spelling of 7730139 in words is "seven million, seven hundred thirty thousand, one hundred thirty-nine".