64940023 has 8 divisors (see below), whose sum is σ = 66661056. Its totient is φ = 63225600.

The previous prime is 64940021. The next prime is 64940033. The reversal of 64940023 is 32004946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64940023 - 2¹ = 64940021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64939973 and 64940000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64940021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22978 + ... + 25648.

It is an arithmetic number, because the mean of its divisors is an integer number (8332632).

Almost surely, 2^64940023 is an apocalyptic number.

64940023 is a deficient number, since it is larger than the sum of its proper divisors (1721033).

64940023 is a wasteful number, since it uses less digits than its factorization.

64940023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 64940023 is about 8058.5372742204. The cubic root of 64940023 is about 401.9488705877.

Adding to 64940023 its reverse (32004946), we get a palindrome (96944969).

The spelling of 64940023 in words is "sixty-four million, nine hundred forty thousand, twenty-three".