64394963 has 16 divisors (see below), whose sum is σ = 71668800. Its totient is φ = 57547776.

The previous prime is 64394927. The next prime is 64394977. The reversal of 64394963 is 36949346.

64394963 is nontrivially palindromic in base 16.

It is a cyclic number.

It is not a de Polignac number, because 64394963 - 2¹⁰ = 64393939 is a prime.

It is a super-2 number, since 2×64394963² = 8293422519542738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64394903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60863 + ... + 61911.

It is an arithmetic number, because the mean of its divisors is an integer number (4479300).

Almost surely, 2^64394963 is an apocalyptic number.

64394963 is a deficient number, since it is larger than the sum of its proper divisors (7273837).

64394963 is a wasteful number, since it uses less digits than its factorization.

64394963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246.

The product of its digits is 419904, while the sum is 44.

The square root of 64394963 is about 8024.6472196602. The cubic root of 64394963 is about 400.8211527004.

The spelling of 64394963 in words is "sixty-four million, three hundred ninety-four thousand, nine hundred sixty-three".