1144664401 has 2 divisors, whose sum is σ = 1144664402. Its totient is φ = 1144664400.

The previous prime is 1144664399. The next prime is 1144664407. The reversal of 1144664401 is 1044664411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075774401 + 68890000 = 32799^2 + 8300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144664401 - 2¹ = 1144664399 is a prime.

Together with 1144664399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1144664407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572332200 + 572332201.

It is an arithmetic number, because the mean of its divisors is an integer number (572332201).

Almost surely, 2^1144664401 is an apocalyptic number.

It is an amenable number.

1144664401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144664401 is an equidigital number, since it uses as much as digits as its factorization.

1144664401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1144664401 is about 33832.8893386302. The cubic root of 1144664401 is about 1046.0667360755.

The spelling of 1144664401 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, four hundred one".