1031129969 has 2 divisors, whose sum is σ = 1031129970. Its totient is φ = 1031129968.

The previous prime is 1031129963. The next prime is 1031129971. The reversal of 1031129969 is 9699211301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 867597025 + 163532944 = 29455^2 + 12788^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031129969 - 2¹² = 1031125873 is a prime.

It is a super-2 number, since 2×1031129969² = 2126458025939881922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1031129971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1031129963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515564984 + 515564985.

It is an arithmetic number, because the mean of its divisors is an integer number (515564985).

Almost surely, 2^1031129969 is an apocalyptic number.

It is an amenable number.

1031129969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031129969 is an equidigital number, since it uses as much as digits as its factorization.

1031129969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 1031129969 is about 32111.2125121429. The cubic root of 1031129969 is about 1010.2708057291.

The spelling of 1031129969 in words is "one billion, thirty-one million, one hundred twenty-nine thousand, nine hundred sixty-nine".