1403609 has 2 divisors, whose sum is σ = 1403610. Its totient is φ = 1403608.

The previous prime is 1403603. The next prime is 1403617. The reversal of 1403609 is 9063041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994009 + 409600 = 997^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403609 - 2¹² = 1399513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1403603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701804 + 701805.

It is an arithmetic number, because the mean of its divisors is an integer number (701805).

2^1403609 is an apocalyptic number.

It is an amenable number.

1403609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403609 is an equidigital number, since it uses as much as digits as its factorization.

1403609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1403609 is about 1184.7400558772. The cubic root of 1403609 is about 111.9649390680.

The spelling of 1403609 in words is "one million, four hundred three thousand, six hundred nine".