72287393 has 2 divisors, whose sum is σ = 72287394. Its totient is φ = 72287392.

The previous prime is 72287339. The next prime is 72287399. The reversal of 72287393 is 39378227.

Together with previous prime (72287339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45589504 + 26697889 = 6752^2 + 5167^2 .

It is a cyclic number.

It is not a de Polignac number, because 72287393 - 2⁶ = 72287329 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72287393.

It is not a weakly prime, because it can be changed into another prime (72287399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36143696 + 36143697.

It is an arithmetic number, because the mean of its divisors is an integer number (36143697).

Almost surely, 2^72287393 is an apocalyptic number.

It is an amenable number.

72287393 is a deficient number, since it is larger than the sum of its proper divisors (1).

72287393 is an equidigital number, since it uses as much as digits as its factorization.

72287393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 72287393 is about 8502.1993037096. The cubic root of 72287393 is about 416.5695497034.

The spelling of 72287393 in words is "seventy-two million, two hundred eighty-seven thousand, three hundred ninety-three".