72243403 has 2 divisors, whose sum is σ = 72243404. Its totient is φ = 72243402.

The previous prime is 72243389. The next prime is 72243407. The reversal of 72243403 is 30434227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72243403 - 2¹⁷ = 72112331 is a prime.

It is not a weakly prime, because it can be changed into another prime (72243407) 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, 36121701 + 36121702.

It is an arithmetic number, because the mean of its divisors is an integer number (36121702).

Almost surely, 2^72243403 is an apocalyptic number.

72243403 is a deficient number, since it is larger than the sum of its proper divisors (1).

72243403 is an equidigital number, since it uses as much as digits as its factorization.

72243403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 72243403 is about 8499.6119323179. The cubic root of 72243403 is about 416.4850323708.

The spelling of 72243403 in words is "seventy-two million, two hundred forty-three thousand, four hundred three".