64870123 has 4 divisors (see below), whose sum is σ = 68284360. Its totient is φ = 61455888.

The previous prime is 64870103. The next prime is 64870163. The reversal of 64870123 is 32107846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32107846 = 2 ⋅16053923.

It is a cyclic number.

It is not a de Polignac number, because 64870123 - 2⁹ = 64869611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64870103) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1707090 + ... + 1707127.

It is an arithmetic number, because the mean of its divisors is an integer number (17071090).

Almost surely, 2^64870123 is an apocalyptic number.

64870123 is a deficient number, since it is larger than the sum of its proper divisors (3414237).

64870123 is a wasteful number, since it uses less digits than its factorization.

64870123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414236.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 64870123 is about 8054.1990911574. The cubic root of 64870123 is about 401.8046025308.

Adding to 64870123 its reverse (32107846), we get a palindrome (96977969).

The spelling of 64870123 in words is "sixty-four million, eight hundred seventy thousand, one hundred twenty-three".