1002329981 has 2 divisors, whose sum is σ = 1002329982. Its totient is φ = 1002329980.

The previous prime is 1002329947. The next prime is 1002330019. The reversal of 1002329981 is 1899232001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655104025 + 347225956 = 25595^2 + 18634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002329981 - 2⁶ = 1002329917 is a prime.

It is a super-2 number, since 2×1002329981² = 2009330781622920722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002329281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501164990 + 501164991.

It is an arithmetic number, because the mean of its divisors is an integer number (501164991).

Almost surely, 2^1002329981 is an apocalyptic number.

It is an amenable number.

1002329981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002329981 is an equidigital number, since it uses as much as digits as its factorization.

1002329981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1002329981 is about 31659.5954017104. The cubic root of 1002329981 is about 1000.7760579117.

It can be divided in two parts, 10023 and 29981, that added together give a palindrome (40004).

The spelling of 1002329981 in words is "one billion, two million, three hundred twenty-nine thousand, nine hundred eighty-one".