72868091 has 2 divisors, whose sum is σ = 72868092. Its totient is φ = 72868090.

The previous prime is 72868087. The next prime is 72868093. The reversal of 72868091 is 19086827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72868091 - 2² = 72868087 is a prime.

Together with 72868093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72868093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36434045 + 36434046.

It is an arithmetic number, because the mean of its divisors is an integer number (36434046).

Almost surely, 2^72868091 is an apocalyptic number.

72868091 is a deficient number, since it is larger than the sum of its proper divisors (1).

72868091 is an equidigital number, since it uses as much as digits as its factorization.

72868091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 72868091 is about 8536.2808646389. The cubic root of 72868091 is about 417.6820361474.

The spelling of 72868091 in words is "seventy-two million, eight hundred sixty-eight thousand, ninety-one".