72868093 has 2 divisors, whose sum is σ = 72868094. Its totient is φ = 72868092.

The previous prime is 72868091. The next prime is 72868121. The reversal of 72868093 is 39086827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57790404 + 15077689 = 7602^2 + 3883^2 .

It is a cyclic number.

It is not a de Polignac number, because 72868093 - 2¹ = 72868091 is a prime.

Together with 72868091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72868091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36434046 + 36434047.

It is an arithmetic number, because the mean of its divisors is an integer number (36434047).

Almost surely, 2^72868093 is an apocalyptic number.

It is an amenable number.

72868093 is a deficient number, since it is larger than the sum of its proper divisors (1).

72868093 is an equidigital number, since it uses as much as digits as its factorization.

72868093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 72868093 is about 8536.2809817859. The cubic root of 72868093 is about 417.6820399688.

The spelling of 72868093 in words is "seventy-two million, eight hundred sixty-eight thousand, ninety-three".