652128723 has 12 divisors (see below), whose sum is σ = 942186648. Its totient is φ = 434649600.

The previous prime is 652128707. The next prime is 652128731. The reversal of 652128723 is 327821256.

It is not a de Polignac number, because 652128723 - 2⁴ = 652128707 is a prime.

It is a super-2 number, since 2×652128723² = 850543742723221458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (652128703) 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, 63123 + ... + 72723.

It is an arithmetic number, because the mean of its divisors is an integer number (78515554).

Almost surely, 2^652128723 is an apocalyptic number.

652128723 is a deficient number, since it is larger than the sum of its proper divisors (290057925).

652128723 is a wasteful number, since it uses less digits than its factorization.

652128723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17154 (or 17151 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 652128723 is about 25536.8111360835. The cubic root of 652128723 is about 867.1837072754.

Adding to 652128723 its reverse (327821256), we get a palindrome (979949979).

The spelling of 652128723 in words is "six hundred fifty-two million, one hundred twenty-eight thousand, seven hundred twenty-three".