64891379 has 8 divisors (see below), whose sum is σ = 75178080. Its totient is φ = 54858816.

The previous prime is 64891367. The next prime is 64891381. The reversal of 64891379 is 97319846.

64891379 is nontrivially palindromic in base 8.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64891379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64891399) 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 in 7 ways as a sum of consecutive naturals, for example, 62984 + ... + 64005.

It is an arithmetic number, because the mean of its divisors is an integer number (9397260).

Almost surely, 2^64891379 is an apocalyptic number.

64891379 is a deficient number, since it is larger than the sum of its proper divisors (10286701).

64891379 is a wasteful number, since it uses less digits than its factorization.

64891379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127069.

The product of its digits is 326592, while the sum is 47.

The square root of 64891379 is about 8055.5185432100. The cubic root of 64891379 is about 401.8484841903.

The spelling of 64891379 in words is "sixty-four million, eight hundred ninety-one thousand, three hundred seventy-nine".