437228989 has 2 divisors, whose sum is σ = 437228990. Its totient is φ = 437228988.

The previous prime is 437228971. The next prime is 437229017. The reversal of 437228989 is 989822734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286184889 + 151044100 = 16917^2 + 12290^2 .

It is a cyclic number.

It is not a de Polignac number, because 437228989 - 2¹⁷ = 437097917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (437228489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218614494 + 218614495.

It is an arithmetic number, because the mean of its divisors is an integer number (218614495).

Almost surely, 2^437228989 is an apocalyptic number.

It is an amenable number.

437228989 is a deficient number, since it is larger than the sum of its proper divisors (1).

437228989 is an equidigital number, since it uses as much as digits as its factorization.

437228989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 437228989 is about 20910.0212577606. The cubic root of 437228989 is about 758.9904583977.

The spelling of 437228989 in words is "four hundred thirty-seven million, two hundred twenty-eight thousand, nine hundred eighty-nine".