1969883991 has 24 divisors (see below), whose sum is σ = 2919164976. Its totient is φ = 1279301760.

The previous prime is 1969883987. The next prime is 1969883999. The reversal of 1969883991 is 1993889691.

It is not a de Polignac number, because 1969883991 - 2² = 1969883987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969883999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266836 + ... + 274118.

It is an arithmetic number, because the mean of its divisors is an integer number (121631874).

Almost surely, 2^1969883991 is an apocalyptic number.

1969883991 is a deficient number, since it is larger than the sum of its proper divisors (949280985).

1969883991 is a wasteful number, since it uses less digits than its factorization.

1969883991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8063 (or 8060 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 63.

The square root of 1969883991 is about 44383.3751645816. The cubic root of 1969883991 is about 1253.5650739452.

The spelling of 1969883991 in words is "one billion, nine hundred sixty-nine million, eight hundred eighty-three thousand, nine hundred ninety-one".