272749861 has 4 divisors (see below), whose sum is σ = 277372800. Its totient is φ = 268126924.

The previous prime is 272749859. The next prime is 272749877. The reversal of 272749861 is 168947272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 272749861 - 2¹ = 272749859 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 (272749661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2311381 + ... + 2311498.

It is an arithmetic number, because the mean of its divisors is an integer number (69343200).

Almost surely, 2^272749861 is an apocalyptic number.

It is an amenable number.

272749861 is a deficient number, since it is larger than the sum of its proper divisors (4622939).

272749861 is an equidigital number, since it uses as much as digits as its factorization.

272749861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622938.

The product of its digits is 338688, while the sum is 46.

The square root of 272749861 is about 16515.1403566546. The cubic root of 272749861 is about 648.5172204509.

The spelling of 272749861 in words is "two hundred seventy-two million, seven hundred forty-nine thousand, eight hundred sixty-one".