1603528961 has 4 divisors (see below), whose sum is σ = 1697854212. Its totient is φ = 1509203712.

The previous prime is 1603528957. The next prime is 1603529009. The reversal of 1603528961 is 1698253061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 550137025 + 1053391936 = 23455^2 + 32456^2 .

It is a cyclic number.

It is not a de Polignac number, because 1603528961 - 2² = 1603528957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1603528061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47162600 + ... + 47162633.

It is an arithmetic number, because the mean of its divisors is an integer number (424463553).

Almost surely, 2^1603528961 is an apocalyptic number.

It is an amenable number.

1603528961 is a deficient number, since it is larger than the sum of its proper divisors (94325251).

1603528961 is an equidigital number, since it uses as much as digits as its factorization.

1603528961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94325250.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1603528961 is about 40044.0877159163. The cubic root of 1603528961 is about 1170.4663592435.

The spelling of 1603528961 in words is "one billion, six hundred three million, five hundred twenty-eight thousand, nine hundred sixty-one".