1919528969 has 2 divisors, whose sum is σ = 1919528970. Its totient is φ = 1919528968.

The previous prime is 1919528953. The next prime is 1919528971. The reversal of 1919528969 is 9698259191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185769225 + 733759744 = 34435^2 + 27088^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919528969 - 2⁴ = 1919528953 is a prime.

It is a super-2 number, since 2×1919528969² = 7369182925660405922, which contains 22 as substring.

Together with 1919528971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1919528929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959764484 + 959764485.

It is an arithmetic number, because the mean of its divisors is an integer number (959764485).

Almost surely, 2^1919528969 is an apocalyptic number.

It is an amenable number.

1919528969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919528969 is an equidigital number, since it uses as much as digits as its factorization.

1919528969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 59.

The square root of 1919528969 is about 43812.4293893868. The cubic root of 1919528969 is about 1242.7913549830.

The spelling of 1919528969 in words is "one billion, nine hundred nineteen million, five hundred twenty-eight thousand, nine hundred sixty-nine".