1969221969 has 48 divisors (see below), whose sum is σ = 3446314560. Its totient is φ = 1101634560.

The previous prime is 1969221967. The next prime is 1969221973. The reversal of 1969221969 is 9691229691.

It is not a de Polignac number, because 1969221969 - 2¹ = 1969221967 is a prime.

It is a super-2 number, since 2×1969221969² = 7755670326384473922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969221967) 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 in 47 ways as a sum of consecutive naturals, for example, 30577 + ... + 69809.

It is an arithmetic number, because the mean of its divisors is an integer number (71798220).

Almost surely, 2^1969221969 is an apocalyptic number.

It is an amenable number.

1969221969 is a deficient number, since it is larger than the sum of its proper divisors (1477092591).

1969221969 is a wasteful number, since it uses less digits than its factorization.

1969221969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39279 (or 39260 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 1969221969 is about 44375.9165426473. The cubic root of 1969221969 is about 1253.4246290178.

It can be divided in two parts, 196922 and 1969, that added together give a palindrome (198891).

The spelling of 1969221969 in words is "one billion, nine hundred sixty-nine million, two hundred twenty-one thousand, nine hundred sixty-nine".