72894533 has 2 divisors, whose sum is σ = 72894534. Its totient is φ = 72894532.

The previous prime is 72894529. The next prime is 72894539. The reversal of 72894533 is 33549827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64032004 + 8862529 = 8002^2 + 2977^2 .

It is a cyclic number.

It is not a de Polignac number, because 72894533 - 2² = 72894529 is a prime.

It is a super-2 number, since 2×72894533² = 10627225882576178, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72894539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36447266 + 36447267.

It is an arithmetic number, because the mean of its divisors is an integer number (36447267).

Almost surely, 2^72894533 is an apocalyptic number.

It is an amenable number.

72894533 is a deficient number, since it is larger than the sum of its proper divisors (1).

72894533 is an equidigital number, since it uses as much as digits as its factorization.

72894533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 72894533 is about 8537.8295251194. The cubic root of 72894533 is about 417.7325521443.

The spelling of 72894533 in words is "seventy-two million, eight hundred ninety-four thousand, five hundred thirty-three".