1021954559 has 2 divisors, whose sum is σ = 1021954560. Its totient is φ = 1021954558.

The previous prime is 1021954553. The next prime is 1021954573. The reversal of 1021954559 is 9554591201.

It is a weak prime.

It is an emirp because it is prime and its reverse (9554591201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021954559 - 2¹² = 1021950463 is a prime.

It is a super-2 number, since 2×1021954559² = 2088782241321768962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021954553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510977279 + 510977280.

It is an arithmetic number, because the mean of its divisors is an integer number (510977280).

Almost surely, 2^1021954559 is an apocalyptic number.

1021954559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021954559 is an equidigital number, since it uses as much as digits as its factorization.

1021954559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 41.

The square root of 1021954559 is about 31968.0240083744. The cubic root of 1021954559 is about 1007.2652742922.

The spelling of 1021954559 in words is "one billion, twenty-one million, nine hundred fifty-four thousand, five hundred fifty-nine".