72881233 has 2 divisors, whose sum is σ = 72881234. Its totient is φ = 72881232.

The previous prime is 72881219. The next prime is 72881309. The reversal of 72881233 is 33218827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72726784 + 154449 = 8528^2 + 393^2 .

It is a cyclic number.

It is not a de Polignac number, because 72881233 - 2¹³ = 72873041 is a prime.

It is not a weakly prime, because it can be changed into another prime (72831233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36440616 + 36440617.

It is an arithmetic number, because the mean of its divisors is an integer number (36440617).

Almost surely, 2^72881233 is an apocalyptic number.

It is an amenable number.

72881233 is a deficient number, since it is larger than the sum of its proper divisors (1).

72881233 is an equidigital number, since it uses as much as digits as its factorization.

72881233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 72881233 is about 8537.0506031064. The cubic root of 72881233 is about 417.7071447479.

The spelling of 72881233 in words is "seventy-two million, eight hundred eighty-one thousand, two hundred thirty-three".