72220849 has 2 divisors, whose sum is σ = 72220850. Its totient is φ = 72220848.

The previous prime is 72220823. The next prime is 72220853. The reversal of 72220849 is 94802227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55056400 + 17164449 = 7420^2 + 4143^2 .

It is a cyclic number.

It is not a de Polignac number, because 72220849 - 2¹⁹ = 71696561 is a prime.

It is not a weakly prime, because it can be changed into another prime (72220859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36110424 + 36110425.

It is an arithmetic number, because the mean of its divisors is an integer number (36110425).

Almost surely, 2^72220849 is an apocalyptic number.

It is an amenable number.

72220849 is a deficient number, since it is larger than the sum of its proper divisors (1).

72220849 is an equidigital number, since it uses as much as digits as its factorization.

72220849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 72220849 is about 8498.2850622935. The cubic root of 72220849 is about 416.4416864010.

The spelling of 72220849 in words is "seventy-two million, two hundred twenty thousand, eight hundred forty-nine".