72225889 has 2 divisors, whose sum is σ = 72225890. Its totient is φ = 72225888.

The previous prime is 72225883. The next prime is 72225917. The reversal of 72225889 is 98852227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62094400 + 10131489 = 7880^2 + 3183^2 .

It is a cyclic number.

It is not a de Polignac number, because 72225889 - 2⁷ = 72225761 is a prime.

It is not a weakly prime, because it can be changed into another prime (72225883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36112944 + 36112945.

It is an arithmetic number, because the mean of its divisors is an integer number (36112945).

Almost surely, 2^72225889 is an apocalyptic number.

It is an amenable number.

72225889 is a deficient number, since it is larger than the sum of its proper divisors (1).

72225889 is an equidigital number, since it uses as much as digits as its factorization.

72225889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 72225889 is about 8498.5815875357. The cubic root of 72225889 is about 416.4513734341.

The spelling of 72225889 in words is "seventy-two million, two hundred twenty-five thousand, eight hundred eighty-nine".