64020723 has 16 divisors (see below), whose sum is σ = 93488640. Its totient is φ = 38728224.

The previous prime is 64020701. The next prime is 64020727. The reversal of 64020723 is 32702046.

It is not a de Polignac number, because 64020723 - 2¹⁰ = 64019699 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64020693 and 64020702.

It is not an unprimeable number, because it can be changed into a prime (64020727) 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, 11611 + ... + 16212.

It is an arithmetic number, because the mean of its divisors is an integer number (5843040).

Almost surely, 2^64020723 is an apocalyptic number.

64020723 is a deficient number, since it is larger than the sum of its proper divisors (29467917).

64020723 is a wasteful number, since it uses less digits than its factorization.

64020723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27898.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 64020723 is about 8001.2950826726. The cubic root of 64020723 is about 400.0431682578.

Adding to 64020723 its reverse (32702046), we get a palindrome (96722769).

The spelling of 64020723 in words is "sixty-four million, twenty thousand, seven hundred twenty-three".