1400444009 has 2 divisors, whose sum is σ = 1400444010. Its totient is φ = 1400444008.

The previous prime is 1400443991. The next prime is 1400444029. The reversal of 1400444009 is 9004440041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1220803600 + 179640409 = 34940^2 + 13403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400444009 is a prime.

It is a super-2 number, since 2×1400444009² = 3922486844687984162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1400444029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700222004 + 700222005.

It is an arithmetic number, because the mean of its divisors is an integer number (700222005).

Almost surely, 2^1400444009 is an apocalyptic number.

It is an amenable number.

1400444009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400444009 is an equidigital number, since it uses as much as digits as its factorization.

1400444009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1400444009 is about 37422.5067172150. The cubic root of 1400444009 is about 1118.8071933808.

The spelling of 1400444009 in words is "one billion, four hundred million, four hundred forty-four thousand, nine".