72223733 has 2 divisors, whose sum is σ = 72223734. Its totient is φ = 72223732.

The previous prime is 72223699. The next prime is 72223747. The reversal of 72223733 is 33732227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63091249 + 9132484 = 7943^2 + 3022^2 .

It is an emirp because it is prime and its reverse (33732227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72223733 - 2⁸ = 72223477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72223696 and 72223705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72223783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36111866 + 36111867.

It is an arithmetic number, because the mean of its divisors is an integer number (36111867).

Almost surely, 2^72223733 is an apocalyptic number.

It is an amenable number.

72223733 is a deficient number, since it is larger than the sum of its proper divisors (1).

72223733 is an equidigital number, since it uses as much as digits as its factorization.

72223733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 29.

The square root of 72223733 is about 8498.4547418928. The cubic root of 72223733 is about 416.4472295918.

The spelling of 72223733 in words is "seventy-two million, two hundred twenty-three thousand, seven hundred thirty-three".