220737989 has 2 divisors, whose sum is σ = 220737990. Its totient is φ = 220737988.

The previous prime is 220737983. The next prime is 220738009. The reversal of 220737989 is 989737022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207849889 + 12888100 = 14417^2 + 3590^2 .

It is a cyclic number.

It is not a de Polignac number, because 220737989 - 2⁸ = 220737733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220737983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110368994 + 110368995.

It is an arithmetic number, because the mean of its divisors is an integer number (110368995).

Almost surely, 2^220737989 is an apocalyptic number.

It is an amenable number.

220737989 is a deficient number, since it is larger than the sum of its proper divisors (1).

220737989 is an equidigital number, since it uses as much as digits as its factorization.

220737989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 220737989 is about 14857.2537502730. The cubic root of 220737989 is about 604.3553354441.

The spelling of 220737989 in words is "two hundred twenty million, seven hundred thirty-seven thousand, nine hundred eighty-nine".