1399603 has 2 divisors, whose sum is σ = 1399604. Its totient is φ = 1399602.

The previous prime is 1399589. The next prime is 1399609. The reversal of 1399603 is 3069931.

It is a strong prime.

It is an emirp because it is prime and its reverse (3069931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1399603 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699801 + 699802.

It is an arithmetic number, because the mean of its divisors is an integer number (699802).

2^1399603 is an apocalyptic number.

1399603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399603 is an equidigital number, since it uses as much as digits as its factorization.

1399603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1399603 is about 1183.0481816055. The cubic root of 1399603 is about 111.8583189344.

It can be divided in two parts, 1399 and 603, that added together give a palindrome (2002).

The spelling of 1399603 in words is "one million, three hundred ninety-nine thousand, six hundred three".