1603949 has 2 divisors, whose sum is σ = 1603950. Its totient is φ = 1603948.

The previous prime is 1603919. The next prime is 1603957. The reversal of 1603949 is 9493061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1249924 + 354025 = 1118^2 + 595^2 .

It is an emirp because it is prime and its reverse (9493061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1603949 - 2¹⁶ = 1538413 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1603919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801974 + 801975.

It is an arithmetic number, because the mean of its divisors is an integer number (801975).

2^1603949 is an apocalyptic number.

It is an amenable number.

1603949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1603949 is an equidigital number, since it uses as much as digits as its factorization.

1603949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1603949 is about 1266.4710813911. The cubic root of 1603949 is about 117.0568550225.

It can be divided in two parts, 1603 and 949, that added together give a palindrome (2552).

The spelling of 1603949 in words is "one million, six hundred three thousand, nine hundred forty-nine".