64020123 has 12 divisors (see below), whose sum is σ = 92590368. Its totient is φ = 42626160.

The previous prime is 64020119. The next prime is 64020127. The reversal of 64020123 is 32102046.

It is a happy number.

64020123 is a `hidden beast` number, since 640 + 2 + 0 + 1 + 23 = 666.

It is an interprime number because it is at equal distance from previous prime (64020119) and next prime (64020127).

It is not a de Polignac number, because 64020123 - 2² = 64020119 is a prime.

It is a super-2 number, since 2×64020123² = 8197152297870258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64020096 and 64020105.

It is not an unprimeable number, because it can be changed into a prime (64020127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3838 + ... + 11948.

It is an arithmetic number, because the mean of its divisors is an integer number (7715864).

Almost surely, 2^64020123 is an apocalyptic number.

64020123 is a deficient number, since it is larger than the sum of its proper divisors (28570245).

64020123 is a wasteful number, since it uses less digits than its factorization.

64020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8994 (or 8991 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 64020123 is about 8001.2575886544. The cubic root of 64020123 is about 400.0419185236.

Adding to 64020123 its reverse (32102046), we get a palindrome (96122169).

The spelling of 64020123 in words is "sixty-four million, twenty thousand, one hundred twenty-three".