220023989 has 2 divisors, whose sum is σ = 220023990. Its totient is φ = 220023988.

The previous prime is 220023961. The next prime is 220024027. The reversal of 220023989 is 989320022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175695025 + 44328964 = 13255^2 + 6658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220023989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220023929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110011994 + 110011995.

It is an arithmetic number, because the mean of its divisors is an integer number (110011995).

Almost surely, 2^220023989 is an apocalyptic number.

It is an amenable number.

220023989 is a deficient number, since it is larger than the sum of its proper divisors (1).

220023989 is an equidigital number, since it uses as much as digits as its factorization.

220023989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 220023989 is about 14833.2056211731. The cubic root of 220023989 is about 603.7030148600.

The spelling of 220023989 in words is "two hundred twenty million, twenty-three thousand, nine hundred eighty-nine".