1353577681 has 3 divisors (see below), whose sum is σ = 1353614473. Its totient is φ = 1353540890.

The previous prime is 1353577679. The next prime is 1353577703. The reversal of 1353577681 is 1867753531.

The square root of 1353577681 is 36791.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1353577681 - 2¹ = 1353577679 is a prime.

It is a super-2 number, since 2×1353577681² = 3664345077002675522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1353077681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18396 + ... + 55186.

Almost surely, 2^1353577681 is an apocalyptic number.

1353577681 is the 36791-st square number.

1353577681 is the 18396-th centered octagonal number.

It is an amenable number.

1353577681 is a deficient number, since it is larger than the sum of its proper divisors (36792).

1353577681 is an frugal number, since it uses more digits than its factorization.

1353577681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73582 (or 36791 counting only the distinct ones).

The product of its digits is 529200, while the sum is 46.

The cubic root of 1353577681 is about 1106.1849061425.

The spelling of 1353577681 in words is "one billion, three hundred fifty-three million, five hundred seventy-seven thousand, six hundred eighty-one".