1020780323 has 4 divisors (see below), whose sum is σ = 1025016168. Its totient is φ = 1016544480.

The previous prime is 1020780269. The next prime is 1020780331. The reversal of 1020780323 is 3230870201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1020780323 - 2⁸ = 1020780067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020780292 and 1020780301.

It is not an unprimeable number, because it can be changed into a prime (1020780353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2117561 + ... + 2118042.

It is an arithmetic number, because the mean of its divisors is an integer number (256254042).

Almost surely, 2^1020780323 is an apocalyptic number.

1020780323 is a deficient number, since it is larger than the sum of its proper divisors (4235845).

1020780323 is an equidigital number, since it uses as much as digits as its factorization.

1020780323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235844.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1020780323 is about 31949.6529402120. The cubic root of 1020780323 is about 1006.8793404855.

The spelling of 1020780323 in words is "one billion, twenty million, seven hundred eighty thousand, three hundred twenty-three".