274774107721 has 3 divisors (see below), whose sum is σ = 274774631911. Its totient is φ = 274773583532.

The previous prime is 274774107703. The next prime is 274774107739. The reversal of 274774107721 is 127701477472.

The square root of 274774107721 is 524189.

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 an interprime number because it is at equal distance from previous prime (274774107703) and next prime (274774107739).

It can be written as a sum of positive squares in only one way, i.e., 1935032121 + 272839075600 = 43989^2 + 522340^2 .

It is not a de Polignac number, because 274774107721 - 2²⁹ = 274237236809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (274774107781) 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, 262095 + ... + 786283.

Almost surely, 2^274774107721 is an apocalyptic number.

274774107721 is the 524189-th square number.

274774107721 is the 262095-th centered octagonal number.

It is an amenable number.

274774107721 is a deficient number, since it is larger than the sum of its proper divisors (524190).

274774107721 is an frugal number, since it uses more digits than its factorization.

274774107721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048378 (or 524189 counting only the distinct ones).

The product of its (nonzero) digits is 1075648, while the sum is 49.

Multiplying 274774107721 by its sum of digits (49), we get a square (13463931278329 = 3669323²).

The spelling of 274774107721 in words is "two hundred seventy-four billion, seven hundred seventy-four million, one hundred seven thousand, seven hundred twenty-one".