1021954573 has 2 divisors, whose sum is σ = 1021954574. Its totient is φ = 1021954572.

The previous prime is 1021954559. The next prime is 1021954597. The reversal of 1021954573 is 3754591201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 984829924 + 37124649 = 31382^2 + 6093^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021954573 - 2⁹ = 1021954061 is a prime.

It is a super-2 number, since 2×1021954573² = 2088782298551224658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021954513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510977286 + 510977287.

It is an arithmetic number, because the mean of its divisors is an integer number (510977287).

Almost surely, 2^1021954573 is an apocalyptic number.

It is an amenable number.

1021954573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021954573 is an equidigital number, since it uses as much as digits as its factorization.

1021954573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 1021954573 is about 31968.0242273432. The cubic root of 1021954573 is about 1007.2652788918.

The spelling of 1021954573 in words is "one billion, twenty-one million, nine hundred fifty-four thousand, five hundred seventy-three".