72203239 has 2 divisors, whose sum is σ = 72203240. Its totient is φ = 72203238.

The previous prime is 72203221. The next prime is 72203251. The reversal of 72203239 is 93230227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72203239 - 2⁵ = 72203207 is a prime.

It is a super-2 number, since 2×72203239² = 10426615444182242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72203039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36101619 + 36101620.

It is an arithmetic number, because the mean of its divisors is an integer number (36101620).

Almost surely, 2^72203239 is an apocalyptic number.

72203239 is a deficient number, since it is larger than the sum of its proper divisors (1).

72203239 is an equidigital number, since it uses as much as digits as its factorization.

72203239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 72203239 is about 8497.2489077348. The cubic root of 72203239 is about 416.4078359070.

The spelling of 72203239 in words is "seventy-two million, two hundred three thousand, two hundred thirty-nine".