1021954513 has 2 divisors, whose sum is σ = 1021954514. Its totient is φ = 1021954512.

The previous prime is 1021954471. The next prime is 1021954523. The reversal of 1021954513 is 3154591201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669153424 + 352801089 = 25868^2 + 18783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021954513 - 2¹⁷ = 1021823441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021954523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510977256 + 510977257.

It is an arithmetic number, because the mean of its divisors is an integer number (510977257).

Almost surely, 2^1021954513 is an apocalyptic number.

It is an amenable number.

1021954513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021954513 is an equidigital number, since it uses as much as digits as its factorization.

1021954513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1021954513 is about 31968.0232889054. The cubic root of 1021954513 is about 1007.2652591793.

The spelling of 1021954513 in words is "one billion, twenty-one million, nine hundred fifty-four thousand, five hundred thirteen".