273435913921 has 9 divisors (see below), whose sum is σ = 274215698211. Its totient is φ = 272658345264.

The previous prime is 273435913909. The next prime is 273435913957. The reversal of 273435913921 is 129319534372.

The square root of 273435913921 is 522911.

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., 45066619521 + 228369294400 = 212289^2 + 477880^2 .

It is not a de Polignac number, because 273435913921 - 2²¹ = 273433816769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (273435913901) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 297535900 + ... + 297536818.

Almost surely, 2^273435913921 is an apocalyptic number.

273435913921 is the 522911-st square number.

273435913921 is the 261456-th centered octagonal number.

It is an amenable number.

273435913921 is a deficient number, since it is larger than the sum of its proper divisors (779784290).

273435913921 is an frugal number, since it uses more digits than its factorization.

273435913921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976 (or 1488 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 49.

Multiplying 273435913921 by its sum of digits (49), we get a square (13398359782129 = 3660377²).

The spelling of 273435913921 in words is "two hundred seventy-three billion, four hundred thirty-five million, nine hundred thirteen thousand, nine hundred twenty-one".