789023220989 has 2 divisors, whose sum is σ = 789023220990. Its totient is φ = 789023220988.

The previous prime is 789023220983. The next prime is 789023221037. The reversal of 789023220989 is 989022320987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666721240900 + 122301980089 = 816530^2 + 349717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-789023220989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (789023220983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394511610494 + 394511610495.

It is an arithmetic number, because the mean of its divisors is an integer number (394511610495).

Almost surely, 2^789023220989 is an apocalyptic number.

It is an amenable number.

789023220989 is a deficient number, since it is larger than the sum of its proper divisors (1).

789023220989 is an equidigital number, since it uses as much as digits as its factorization.

789023220989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 789023220989 in words is "seven hundred eighty-nine billion, twenty-three million, two hundred twenty thousand, nine hundred eighty-nine".