64977379 has 2 divisors, whose sum is σ = 64977380. Its totient is φ = 64977378.

The previous prime is 64977377. The next prime is 64977389. The reversal of 64977379 is 97377946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64977379 - 2¹ = 64977377 is a prime.

Together with 64977377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64977377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32488689 + 32488690.

It is an arithmetic number, because the mean of its divisors is an integer number (32488690).

Almost surely, 2^64977379 is an apocalyptic number.

64977379 is a deficient number, since it is larger than the sum of its proper divisors (1).

64977379 is an equidigital number, since it uses as much as digits as its factorization.

64977379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000376, while the sum is 52.

The square root of 64977379 is about 8060.8547313545. The cubic root of 64977379 is about 402.0259279664.

It can be divided in two parts, 64977 and 379, that added together give a palindrome (65356).

The spelling of 64977379 in words is "sixty-four million, nine hundred seventy-seven thousand, three hundred seventy-nine".