72208687 has 2 divisors, whose sum is σ = 72208688. Its totient is φ = 72208686.

The previous prime is 72208681. The next prime is 72208699. The reversal of 72208687 is 78680227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72208687 - 2³ = 72208679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72208681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36104343 + 36104344.

It is an arithmetic number, because the mean of its divisors is an integer number (36104344).

Almost surely, 2^72208687 is an apocalyptic number.

72208687 is a deficient number, since it is larger than the sum of its proper divisors (1).

72208687 is an equidigital number, since it uses as much as digits as its factorization.

72208687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 72208687 is about 8497.5694760325. The cubic root of 72208687 is about 416.4183088113.

The spelling of 72208687 in words is "seventy-two million, two hundred eight thousand, six hundred eighty-seven".