72706187 has 2 divisors, whose sum is σ = 72706188. Its totient is φ = 72706186.

The previous prime is 72706181. The next prime is 72706211. The reversal of 72706187 is 78160727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72706187 - 2⁴ = 72706171 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 72706187.

It is not a weakly prime, because it can be changed into another prime (72706181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36353093 + 36353094.

It is an arithmetic number, because the mean of its divisors is an integer number (36353094).

Almost surely, 2^72706187 is an apocalyptic number.

72706187 is a deficient number, since it is larger than the sum of its proper divisors (1).

72706187 is an equidigital number, since it uses as much as digits as its factorization.

72706187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 72706187 is about 8526.7923042607. The cubic root of 72706187 is about 417.3724605946.

The spelling of 72706187 in words is "seventy-two million, seven hundred six thousand, one hundred eighty-seven".