72281653 has 2 divisors, whose sum is σ = 72281654. Its totient is φ = 72281652.

The previous prime is 72281641. The next prime is 72281689. The reversal of 72281653 is 35618227.

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., 45995524 + 26286129 = 6782^2 + 5127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72281653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72281623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36140826 + 36140827.

It is an arithmetic number, because the mean of its divisors is an integer number (36140827).

Almost surely, 2^72281653 is an apocalyptic number.

It is an amenable number.

72281653 is a deficient number, since it is larger than the sum of its proper divisors (1).

72281653 is an equidigital number, since it uses as much as digits as its factorization.

72281653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 72281653 is about 8501.8617372903. The cubic root of 72281653 is about 416.5585234723.

The spelling of 72281653 in words is "seventy-two million, two hundred eighty-one thousand, six hundred fifty-three".