7139707 has 4 divisors (see below), whose sum is σ = 7146576. Its totient is φ = 7132840.

The previous prime is 7139701. The next prime is 7139731. The reversal of 7139707 is 7079317.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7079317 = 7 ⋅1011331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7139707 is a prime.

It is a Duffinian number.

7139707 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7139701) 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, 1519 + ... + 4072.

It is an arithmetic number, because the mean of its divisors is an integer number (1786644).

Almost surely, 2^7139707 is an apocalyptic number.

7139707 is a deficient number, since it is larger than the sum of its proper divisors (6869).

7139707 is a wasteful number, since it uses less digits than its factorization.

7139707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6868.

The product of its (nonzero) digits is 9261, while the sum is 34.

The square root of 7139707 is about 2672.0230163679. The cubic root of 7139707 is about 192.5573630138.

The spelling of 7139707 in words is "seven million, one hundred thirty-nine thousand, seven hundred seven".