64771879 has 2 divisors, whose sum is σ = 64771880. Its totient is φ = 64771878.

The previous prime is 64771873. The next prime is 64771897. The reversal of 64771879 is 97817746.

Together with next prime (64771897) 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 not a de Polignac number, because 64771879 - 2³ = 64771871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64771871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32385939 + 32385940.

It is an arithmetic number, because the mean of its divisors is an integer number (32385940).

Almost surely, 2^64771879 is an apocalyptic number.

64771879 is a deficient number, since it is larger than the sum of its proper divisors (1).

64771879 is an equidigital number, since it uses as much as digits as its factorization.

64771879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 49.

The square root of 64771879 is about 8048.0978498028. The cubic root of 64771879 is about 401.6016594079.

The spelling of 64771879 in words is "sixty-four million, seven hundred seventy-one thousand, eight hundred seventy-nine".