272630821 has 4 divisors (see below), whose sum is σ = 272752012. Its totient is φ = 272509632.

The previous prime is 272630807. The next prime is 272630851. The reversal of 272630821 is 128036272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29582721 + 243048100 = 5439^2 + 15590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-272630821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272630851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57156 + ... + 61741.

It is an arithmetic number, because the mean of its divisors is an integer number (68188003).

Almost surely, 2^272630821 is an apocalyptic number.

It is an amenable number.

272630821 is a deficient number, since it is larger than the sum of its proper divisors (121191).

272630821 is a wasteful number, since it uses less digits than its factorization.

272630821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121190.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 272630821 is about 16511.5359975988. The cubic root of 272630821 is about 648.4228596038.

The spelling of 272630821 in words is "two hundred seventy-two million, six hundred thirty thousand, eight hundred twenty-one".