64249319 has 4 divisors (see below), whose sum is σ = 64481544. Its totient is φ = 64017096.

The previous prime is 64249313. The next prime is 64249321. The reversal of 64249319 is 91394246.

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 64249319 - 2⁸ = 64249063 is a prime.

It is a super-2 number, since 2×64249319² = 8255949983927522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64249313) 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, 115697 + ... + 116250.

It is an arithmetic number, because the mean of its divisors is an integer number (16120386).

Almost surely, 2^64249319 is an apocalyptic number.

64249319 is a deficient number, since it is larger than the sum of its proper divisors (232225).

64249319 is a wasteful number, since it uses less digits than its factorization.

64249319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232224.

The product of its digits is 46656, while the sum is 38.

The square root of 64249319 is about 8015.5672912153. The cubic root of 64249319 is about 400.5187415605.

The spelling of 64249319 in words is "sixty-four million, two hundred forty-nine thousand, three hundred nineteen".