64980871 has 2 divisors, whose sum is σ = 64980872. Its totient is φ = 64980870.

The previous prime is 64980857. The next prime is 64980899. The reversal of 64980871 is 17808946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64980871 - 2¹³ = 64972679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64980841) 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, 32490435 + 32490436.

It is an arithmetic number, because the mean of its divisors is an integer number (32490436).

Almost surely, 2^64980871 is an apocalyptic number.

64980871 is a deficient number, since it is larger than the sum of its proper divisors (1).

64980871 is an equidigital number, since it uses as much as digits as its factorization.

64980871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 64980871 is about 8061.0713307848. The cubic root of 64980871 is about 402.0331297003.

The spelling of 64980871 in words is "sixty-four million, nine hundred eighty thousand, eight hundred seventy-one".