64835819 has 4 divisors (see below), whose sum is σ = 65248944. Its totient is φ = 64422696.

The previous prime is 64835791. The next prime is 64835821. The reversal of 64835819 is 91853846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64835819 is a prime.

It is a super-2 number, since 2×64835819² = 8407366850801522, 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 64835819.

It is not an unprimeable number, because it can be changed into a prime (64835119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206327 + ... + 206640.

It is an arithmetic number, because the mean of its divisors is an integer number (16312236).

Almost surely, 2^64835819 is an apocalyptic number.

64835819 is a deficient number, since it is larger than the sum of its proper divisors (413125).

64835819 is a wasteful number, since it uses less digits than its factorization.

64835819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413124.

The product of its digits is 207360, while the sum is 44.

The square root of 64835819 is about 8052.0692371589. The cubic root of 64835819 is about 401.7337638829.

The spelling of 64835819 in words is "sixty-four million, eight hundred thirty-five thousand, eight hundred nineteen".