64863674 has 4 divisors (see below), whose sum is σ = 97295514. Its totient is φ = 32431836.

The previous prime is 64863647. The next prime is 64863697. The reversal of 64863674 is 47636846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47636846 = 2 ⋅23818423.

It can be written as a sum of positive squares in only one way, i.e., 33582025 + 31281649 = 5795^2 + 5593^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16215917 + ... + 16215920.

Almost surely, 2^64863674 is an apocalyptic number.

64863674 is a deficient number, since it is larger than the sum of its proper divisors (32431840).

64863674 is a wasteful number, since it uses less digits than its factorization.

64863674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32431839.

The product of its digits is 580608, while the sum is 44.

The square root of 64863674 is about 8053.7987310337. The cubic root of 64863674 is about 401.7912870854.

The spelling of 64863674 in words is "sixty-four million, eight hundred sixty-three thousand, six hundred seventy-four".