1293049681 has 27 divisors (see below), whose sum is σ = 1656880617. Its totient is φ = 1005413640.

The previous prime is 1293049679. The next prime is 1293049691. The reversal of 1293049681 is 1869403921.

It is a happy number.

The square root of 1293049681 is 35959.

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

It is not a de Polignac number, because 1293049681 - 2¹ = 1293049679 is a prime.

It is a super-2 number, since 2×1293049681² = 3343954955068403522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1293049691) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2768610 + ... + 2769076.

Almost surely, 2^1293049681 is an apocalyptic number.

1293049681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1293049681 is the 35959-th square number.

1293049681 is the 17980-th centered octagonal number.

It is an amenable number.

1293049681 is a deficient number, since it is larger than the sum of its proper divisors (363830936).

1293049681 is an frugal number, since it uses more digits than its factorization.

1293049681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The cubic root of 1293049681 is about 1089.4443991099. Note that the first 3 decimals are identical.

The spelling of 1293049681 in words is "one billion, two hundred ninety-three million, forty-nine thousand, six hundred eighty-one".