1399633 has 2 divisors, whose sum is σ = 1399634. Its totient is φ = 1399632.

The previous prime is 1399621. The next prime is 1399639. The reversal of 1399633 is 3369931.

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., 1399489 + 144 = 1183^2 + 12^2 .

It is an emirp because it is prime and its reverse (3369931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1399633 - 2⁹ = 1399121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699816 + 699817.

It is an arithmetic number, because the mean of its divisors is an integer number (699817).

2^1399633 is an apocalyptic number.

It is an amenable number.

1399633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399633 is an equidigital number, since it uses as much as digits as its factorization.

1399633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 34.

The square root of 1399633 is about 1183.0608606492. The cubic root of 1399633 is about 111.8591181433.

The spelling of 1399633 in words is "one million, three hundred ninety-nine thousand, six hundred thirty-three".