65949139 has 2 divisors, whose sum is σ = 65949140. Its totient is φ = 65949138.

The previous prime is 65949127. The next prime is 65949181. The reversal of 65949139 is 93194956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65949139 - 2¹³ = 65940947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65949109) 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 as a sum of consecutive naturals, namely, 32974569 + 32974570.

It is an arithmetic number, because the mean of its divisors is an integer number (32974570).

Almost surely, 2^65949139 is an apocalyptic number.

65949139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65949139 is an equidigital number, since it uses as much as digits as its factorization.

65949139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 46.

The square root of 65949139 is about 8120.9075231774. The cubic root of 65949139 is about 404.0201665423.

The spelling of 65949139 in words is "sixty-five million, nine hundred forty-nine thousand, one hundred thirty-nine".