440145413 has 2 divisors, whose sum is σ = 440145414. Its totient is φ = 440145412.

The previous prime is 440145371. The next prime is 440145421. The reversal of 440145413 is 314541044.

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., 422014849 + 18130564 = 20543^2 + 4258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440145413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440145493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220072706 + 220072707.

It is an arithmetic number, because the mean of its divisors is an integer number (220072707).

Almost surely, 2^440145413 is an apocalyptic number.

It is an amenable number.

440145413 is a deficient number, since it is larger than the sum of its proper divisors (1).

440145413 is an equidigital number, since it uses as much as digits as its factorization.

440145413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 440145413 is about 20979.6428234610. The cubic root of 440145413 is about 760.6742706096.

Adding to 440145413 its reverse (314541044), we get a palindrome (754686457).

The spelling of 440145413 in words is "four hundred forty million, one hundred forty-five thousand, four hundred thirteen".