64890002 has 4 divisors (see below), whose sum is σ = 97335006. Its totient is φ = 32445000.

The previous prime is 64889983. The next prime is 64890011. The reversal of 64890002 is 20009846.

64890002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20009846 = 2 ⋅10004923.

It can be written as a sum of positive squares in only one way, i.e., 60357361 + 4532641 = 7769^2 + 2129^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16222499 + ... + 16222502.

Almost surely, 2^64890002 is an apocalyptic number.

64890002 is a deficient number, since it is larger than the sum of its proper divisors (32445004).

64890002 is a wasteful number, since it uses less digits than its factorization.

64890002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32445003.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 64890002 is about 8055.4330733984. The cubic root of 64890002 is about 401.8456417518.

Adding to 64890002 its reverse (20009846), we get a palindrome (84899848).

The spelling of 64890002 in words is "sixty-four million, eight hundred ninety thousand, two".