1020553117 has 2 divisors, whose sum is σ = 1020553118. Its totient is φ = 1020553116.

The previous prime is 1020553097. The next prime is 1020553147. The reversal of 1020553117 is 7113550201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736091161 + 284461956 = 27131^2 + 16866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020553117 - 2¹¹ = 1020551069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020553091 and 1020553100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020553147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510276558 + 510276559.

It is an arithmetic number, because the mean of its divisors is an integer number (510276559).

Almost surely, 2^1020553117 is an apocalyptic number.

It is an amenable number.

1020553117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020553117 is an equidigital number, since it uses as much as digits as its factorization.

1020553117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 1020553117 is about 31946.0970542569. The cubic root of 1020553117 is about 1006.8046309724.

The spelling of 1020553117 in words is "one billion, twenty million, five hundred fifty-three thousand, one hundred seventeen".