1020163601 has 4 divisors (see below), whose sum is σ = 1020228132. Its totient is φ = 1020099072.

The previous prime is 1020163583. The next prime is 1020163607. The reversal of 1020163601 is 1063610201.

It is a Cunningham number, because it is equal to 31940²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1063610201 = 53 ⋅20068117.

It can be written as a sum of positive squares in 2 ways, for example, as 12418576 + 1007745025 = 3524^2 + 31745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020163601 - 2¹⁴ = 1020147217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020163607) 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, 9281 + ... + 46113.

It is an arithmetic number, because the mean of its divisors is an integer number (255057033).

Almost surely, 2^1020163601 is an apocalyptic number.

It is an amenable number.

1020163601 is a deficient number, since it is larger than the sum of its proper divisors (64531).

1020163601 is an equidigital number, since it uses as much as digits as its factorization.

1020163601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64530.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1020163601 is about 31940.0000156544. Note that the first 4 decimals coincide. The cubic root of 1020163601 is about 1006.6765251411.

Adding to 1020163601 its reverse (1063610201), we get a palindrome (2083773802).

The spelling of 1020163601 in words is "one billion, twenty million, one hundred sixty-three thousand, six hundred one".