1020553103 has 4 divisors (see below), whose sum is σ = 1020619128. Its totient is φ = 1020487080.

The previous prime is 1020553097. The next prime is 1020553117. The reversal of 1020553103 is 3013550201.

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.

It is a cyclic number.

It is not a de Polignac number, because 1020553103 - 2⁸ = 1020552847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020553603) 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, 4025 + ... + 45357.

It is an arithmetic number, because the mean of its divisors is an integer number (255154782).

Almost surely, 2^1020553103 is an apocalyptic number.

1020553103 is a deficient number, since it is larger than the sum of its proper divisors (66025).

1020553103 is an equidigital number, since it uses as much as digits as its factorization.

1020553103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66024.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 1020553103 is about 31946.0968351378. The cubic root of 1020553103 is about 1006.8046263686.

The spelling of 1020553103 in words is "one billion, twenty million, five hundred fifty-three thousand, one hundred three".