1954789369 has 27 divisors (see below), whose sum is σ = 2246544783. Its totient is φ = 1699901424.

The previous prime is 1954789339. The next prime is 1954789409. The reversal of 1954789369 is 9639874591.

The square root of 1954789369 is 44213.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 289170025 + 1665619344 = 17005^2 + 40812^2 .

It is not a de Polignac number, because 1954789369 - 2⁵ = 1954789337 is a prime.

It is a super-2 number, since 2×1954789369² = 7642402954310836322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1954789339) 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 26 ways as a sum of consecutive naturals, for example, 10920522 + ... + 10920700.

Almost surely, 2^1954789369 is an apocalyptic number.

1954789369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1954789369 is the 44213-rd square number.

1954789369 is the 22107-th centered octagonal number.

It is an amenable number.

1954789369 is a deficient number, since it is larger than the sum of its proper divisors (291755414).

1954789369 is an equidigital number, since it uses as much as digits as its factorization.

1954789369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 211 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 61.

The cubic root of 1954789369 is about 1250.3549645772.

The spelling of 1954789369 in words is "one billion, nine hundred fifty-four million, seven hundred eighty-nine thousand, three hundred sixty-nine".