1400443397 has 2 divisors, whose sum is σ = 1400443398. Its totient is φ = 1400443396.

The previous prime is 1400443361. The next prime is 1400443399. The reversal of 1400443397 is 7933440041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 760049761 + 640393636 = 27569^2 + 25306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400443397 - 2⁶ = 1400443333 is a prime.

It is a super-2 number, since 2×1400443397² = 3922483416401799218, which contains 22 as substring.

Together with 1400443399, 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 (1400443399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700221698 + 700221699.

It is an arithmetic number, because the mean of its divisors is an integer number (700221699).

Almost surely, 2^1400443397 is an apocalyptic number.

It is an amenable number.

1400443397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400443397 is an equidigital number, since it uses as much as digits as its factorization.

1400443397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 1400443397 is about 37422.4985403166. The cubic root of 1400443397 is about 1118.8070304063.

The spelling of 1400443397 in words is "one billion, four hundred million, four hundred forty-three thousand, three hundred ninety-seven".