272345861 has 2 divisors, whose sum is σ = 272345862. Its totient is φ = 272345860.

The previous prime is 272345849. The next prime is 272345893. The reversal of 272345861 is 168543272.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271623361 + 722500 = 16481^2 + 850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-272345861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272345561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136172930 + 136172931.

It is an arithmetic number, because the mean of its divisors is an integer number (136172931).

Almost surely, 2^272345861 is an apocalyptic number.

It is an amenable number.

272345861 is a deficient number, since it is larger than the sum of its proper divisors (1).

272345861 is an equidigital number, since it uses as much as digits as its factorization.

272345861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 272345861 is about 16502.9046231262. The cubic root of 272345861 is about 648.1968653555.

It can be divided in two parts, 2723 and 45861, that added together give a palindrome (48584).

The spelling of 272345861 in words is "two hundred seventy-two million, three hundred forty-five thousand, eight hundred sixty-one".