64949219 has 4 divisors (see below), whose sum is σ = 65017080. Its totient is φ = 64881360.

The previous prime is 64949191. The next prime is 64949237. The reversal of 64949219 is 91294946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64949219 - 2¹⁶ = 64883683 is a prime.

It is a super-2 number, since 2×64949219² = 8436802097419922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64949219.

It is not an unprimeable number, because it can be changed into a prime (64949119) 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 3 ways as a sum of consecutive naturals, for example, 32474 + ... + 34415.

It is an arithmetic number, because the mean of its divisors is an integer number (16254270).

Almost surely, 2^64949219 is an apocalyptic number.

64949219 is a deficient number, since it is larger than the sum of its proper divisors (67861).

64949219 is an equidigital number, since it uses as much as digits as its factorization.

64949219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67860.

The product of its digits is 139968, while the sum is 44.

The square root of 64949219 is about 8059.1078290342. The cubic root of 64949219 is about 401.9678426956.

The spelling of 64949219 in words is "sixty-four million, nine hundred forty-nine thousand, two hundred nineteen".