1831069681 has 9 divisors (see below), whose sum is σ = 2130368331. Its totient is φ = 1569231552.

The previous prime is 1831069651. The next prime is 1831069697. The reversal of 1831069681 is 1869601381.

It is a happy number.

The square root of 1831069681 is 42791.

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., 1012194225 + 818875456 = 31815^2 + 28616^2 .

It is not a de Polignac number, because 1831069681 - 2¹⁵ = 1831036913 is a prime.

It is a super-2 number, since 2×1831069681² = 6705632353354883522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1831069601) 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 8 ways as a sum of consecutive naturals, for example, 296481 + ... + 302593.

Almost surely, 2^1831069681 is an apocalyptic number.

1831069681 is the 42791-st square number.

1831069681 is the 21396-th centered octagonal number.

It is an amenable number.

1831069681 is a deficient number, since it is larger than the sum of its proper divisors (299298650).

1831069681 is an frugal number, since it uses more digits than its factorization.

1831069681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12240 (or 6120 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The cubic root of 1831069681 is about 1223.3994770956.

The spelling of 1831069681 in words is "one billion, eight hundred thirty-one million, sixty-nine thousand, six hundred eighty-one".