440649101 has 2 divisors, whose sum is σ = 440649102. Its totient is φ = 440649100.

The previous prime is 440649091. The next prime is 440649103. The reversal of 440649101 is 101946044.

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., 436768201 + 3880900 = 20899^2 + 1970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440649101 is a prime.

Together with 440649103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440649103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220324550 + 220324551.

It is an arithmetic number, because the mean of its divisors is an integer number (220324551).

Almost surely, 2^440649101 is an apocalyptic number.

It is an amenable number.

440649101 is a deficient number, since it is larger than the sum of its proper divisors (1).

440649101 is an equidigital number, since it uses as much as digits as its factorization.

440649101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 440649101 is about 20991.6435992992. The cubic root of 440649101 is about 760.9643235721.

The spelling of 440649101 in words is "four hundred forty million, six hundred forty-nine thousand, one hundred one".