1022429981 has 2 divisors, whose sum is σ = 1022429982. Its totient is φ = 1022429980.

The previous prime is 1022429977. The next prime is 1022429987. The reversal of 1022429981 is 1899242201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 916030756 + 106399225 = 30266^2 + 10315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022429981 - 2² = 1022429977 is a prime.

It is a super-3 number, since 3×1022429981³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022429987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511214990 + 511214991.

It is an arithmetic number, because the mean of its divisors is an integer number (511214991).

Almost surely, 2^1022429981 is an apocalyptic number.

It is an amenable number.

1022429981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022429981 is an equidigital number, since it uses as much as digits as its factorization.

1022429981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1022429981 is about 31975.4590428347. The cubic root of 1022429981 is about 1007.4214462169.

The spelling of 1022429981 in words is "one billion, twenty-two million, four hundred twenty-nine thousand, nine hundred eighty-one".