1399913 has 2 divisors, whose sum is σ = 1399914. Its totient is φ = 1399912.

The previous prime is 1399883. The next prime is 1399919. The reversal of 1399913 is 3199931.

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., 1024144 + 375769 = 1012^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399913 - 2¹² = 1395817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399919) 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, 699956 + 699957.

It is an arithmetic number, because the mean of its divisors is an integer number (699957).

2^1399913 is an apocalyptic number.

It is an amenable number.

1399913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399913 is an equidigital number, since it uses as much as digits as its factorization.

1399913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6561, while the sum is 35.

The square root of 1399913 is about 1183.1791918387. The cubic root of 1399913 is about 111.8665768759.

The spelling of 1399913 in words is "one million, three hundred ninety-nine thousand, nine hundred thirteen".