6945139 has 2 divisors, whose sum is σ = 6945140. Its totient is φ = 6945138.

The previous prime is 6945131. The next prime is 6945161. The reversal of 6945139 is 9315496.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6945139 - 2³ = 6945131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6945098 and 6945107.

It is not a weakly prime, because it can be changed into another prime (6945131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3472569 + 3472570.

It is an arithmetic number, because the mean of its divisors is an integer number (3472570).

Almost surely, 2^6945139 is an apocalyptic number.

6945139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6945139 is an equidigital number, since it uses as much as digits as its factorization.

6945139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 37.

The square root of 6945139 is about 2635.3631628297. The cubic root of 6945139 is about 190.7920674213.

It can be divided in two parts, 6945 and 139, that multiplied together give a triangular number (965355 = T₁₃₈₉).

The spelling of 6945139 in words is "six million, nine hundred forty-five thousand, one hundred thirty-nine".