72687211 has 2 divisors, whose sum is σ = 72687212. Its totient is φ = 72687210.

The previous prime is 72687191. The next prime is 72687227. The reversal of 72687211 is 11278627.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72687211 - 2¹¹ = 72685163 is a prime.

It is not a weakly prime, because it can be changed into another prime (72687271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36343605 + 36343606.

It is an arithmetic number, because the mean of its divisors is an integer number (36343606).

Almost surely, 2^72687211 is an apocalyptic number.

72687211 is a deficient number, since it is larger than the sum of its proper divisors (1).

72687211 is an equidigital number, since it uses as much as digits as its factorization.

72687211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 34.

The square root of 72687211 is about 8525.6795037111. The cubic root of 72687211 is about 417.3361466334.

The spelling of 72687211 in words is "seventy-two million, six hundred eighty-seven thousand, two hundred eleven".