440649089 has 2 divisors, whose sum is σ = 440649090. Its totient is φ = 440649088.

The previous prime is 440649071. The next prime is 440649091. The reversal of 440649089 is 980946044.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409657600 + 30991489 = 20240^2 + 5567^2 .

It is a cyclic number.

It is not a de Polignac number, because 440649089 - 2¹² = 440644993 is a prime.

Together with 440649091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (440649029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220324544 + 220324545.

It is an arithmetic number, because the mean of its divisors is an integer number (220324545).

Almost surely, 2^440649089 is an apocalyptic number.

It is an amenable number.

440649089 is a deficient number, since it is larger than the sum of its proper divisors (1).

440649089 is an equidigital number, since it uses as much as digits as its factorization.

440649089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 440649089 is about 20991.6433134712. The cubic root of 440649089 is about 760.9643166645.

The spelling of 440649089 in words is "four hundred forty million, six hundred forty-nine thousand, eighty-nine".