1020201789 has 16 divisors (see below), whose sum is σ = 1465164800. Its totient is φ = 629351856.

The previous prime is 1020201781. The next prime is 1020201821. The reversal of 1020201789 is 9871020201.

It is not a de Polignac number, because 1020201789 - 2³ = 1020201781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020201781) 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, 205669 + ... + 210570.

It is an arithmetic number, because the mean of its divisors is an integer number (91572800).

Almost surely, 2^1020201789 is an apocalyptic number.

1020201789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1020201789 is a deficient number, since it is larger than the sum of its proper divisors (444963011).

1020201789 is a wasteful number, since it uses less digits than its factorization.

1020201789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416304.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1020201789 is about 31940.5978184504. The cubic root of 1020201789 is about 1006.6890860296.

The spelling of 1020201789 in words is "one billion, twenty million, two hundred one thousand, seven hundred eighty-nine".