1603121453 has 2 divisors, whose sum is σ = 1603121454. Its totient is φ = 1603121452.

The previous prime is 1603121423. The next prime is 1603121467. The reversal of 1603121453 is 3541213061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1590254884 + 12866569 = 39878^2 + 3587^2 .

It is an emirp because it is prime and its reverse (3541213061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1603121453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1603121423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801560726 + 801560727.

It is an arithmetic number, because the mean of its divisors is an integer number (801560727).

Almost surely, 2^1603121453 is an apocalyptic number.

It is an amenable number.

1603121453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1603121453 is an equidigital number, since it uses as much as digits as its factorization.

1603121453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1603121453 is about 40038.9991508279. Note that the first 3 decimals coincide. The cubic root of 1603121453 is about 1170.3671998629.

The spelling of 1603121453 in words is "one billion, six hundred three million, one hundred twenty-one thousand, four hundred fifty-three".