880020389 has 2 divisors, whose sum is σ = 880020390. Its totient is φ = 880020388.

The previous prime is 880020353. The next prime is 880020391. The reversal of 880020389 is 983020088.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 771172900 + 108847489 = 27770^2 + 10433^2 .

It is a cyclic number.

It is not a de Polignac number, because 880020389 - 2⁸ = 880020133 is a prime.

It is a super-2 number, since 2×880020389² = 1548871770111422642, which contains 22 as substring.

Together with 880020391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (880020289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440010194 + 440010195.

It is an arithmetic number, because the mean of its divisors is an integer number (440010195).

Almost surely, 2^880020389 is an apocalyptic number.

It is an amenable number.

880020389 is a deficient number, since it is larger than the sum of its proper divisors (1).

880020389 is an equidigital number, since it uses as much as digits as its factorization.

880020389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 880020389 is about 29665.1376029170. The cubic root of 880020389 is about 958.2913722841.

The spelling of 880020389 in words is "eight hundred eighty million, twenty thousand, three hundred eighty-nine".