72574289 has 2 divisors, whose sum is σ = 72574290. Its totient is φ = 72574288.

The previous prime is 72574267. The next prime is 72574321. The reversal of 72574289 is 98247527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40538689 + 32035600 = 6367^2 + 5660^2 .

It is a cyclic number.

It is not a de Polignac number, because 72574289 - 2¹² = 72570193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (72576289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36287144 + 36287145.

It is an arithmetic number, because the mean of its divisors is an integer number (36287145).

Almost surely, 2^72574289 is an apocalyptic number.

It is an amenable number.

72574289 is a deficient number, since it is larger than the sum of its proper divisors (1).

72574289 is an equidigital number, since it uses as much as digits as its factorization.

72574289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 72574289 is about 8519.0544663126. The cubic root of 72574289 is about 417.1199194276.

The spelling of 72574289 in words is "seventy-two million, five hundred seventy-four thousand, two hundred eighty-nine".