1020895789 has 4 divisors (see below), whose sum is σ = 1042617024. Its totient is φ = 999174556.

The previous prime is 1020895769. The next prime is 1020895793. The reversal of 1020895789 is 9875980201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020895789 - 2¹³ = 1020887597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020895739) 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, 10860547 + ... + 10860640.

It is an arithmetic number, because the mean of its divisors is an integer number (260654256).

Almost surely, 2^1020895789 is an apocalyptic number.

It is an amenable number.

1020895789 is a deficient number, since it is larger than the sum of its proper divisors (21721235).

1020895789 is an equidigital number, since it uses as much as digits as its factorization.

1020895789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21721234.

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 1020895789 is about 31951.4598883995. The cubic root of 1020895789 is about 1006.9173035823.

It can be divided in two parts, 1020 and 895789, that added together give a square (896809 = 947²).

The spelling of 1020895789 in words is "one billion, twenty million, eight hundred ninety-five thousand, seven hundred eighty-nine".