1023646321 has 16 divisors (see below), whose sum is σ = 1073606400. Its totient is φ = 974756608.

The previous prime is 1023646271. The next prime is 1023646409. The reversal of 1023646321 is 1236463201.

1023646321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1023646321 - 2⁷ = 1023646193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1023646321.

It is not an unprimeable number, because it can be changed into a prime (1023649321) 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, 782550 + ... + 783856.

It is an arithmetic number, because the mean of its divisors is an integer number (67100400).

Almost surely, 2^1023646321 is an apocalyptic number.

It is an amenable number.

1023646321 is a deficient number, since it is larger than the sum of its proper divisors (49960079).

1023646321 is a wasteful number, since it uses less digits than its factorization.

1023646321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688.

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

The square root of 1023646321 is about 31994.4732883665. The cubic root of 1023646321 is about 1007.8207829030.

The spelling of 1023646321 in words is "one billion, twenty-three million, six hundred forty-six thousand, three hundred twenty-one".