65147879 has 2 divisors, whose sum is σ = 65147880. Its totient is φ = 65147878.

The previous prime is 65147867. The next prime is 65147897. The reversal of 65147879 is 97874156.

Together with next prime (65147897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65147879 is a prime.

It is a super-2 number, since 2×65147879² = 8488492276397282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65144879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32573939 + 32573940.

It is an arithmetic number, because the mean of its divisors is an integer number (32573940).

Almost surely, 2^65147879 is an apocalyptic number.

65147879 is a deficient number, since it is larger than the sum of its proper divisors (1).

65147879 is an equidigital number, since it uses as much as digits as its factorization.

65147879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The square root of 65147879 is about 8071.4236042968. The cubic root of 65147879 is about 402.3772582029.

The spelling of 65147879 in words is "sixty-five million, one hundred forty-seven thousand, eight hundred seventy-nine".