72006187 has 8 divisors (see below), whose sum is σ = 79081200. Its totient is φ = 65019360.

The previous prime is 72006157. The next prime is 72006191. The reversal of 72006187 is 78160027.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72006187 - 2⁷ = 72006059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72006157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20328 + ... + 23605.

It is an arithmetic number, because the mean of its divisors is an integer number (9885150).

Almost surely, 2^72006187 is an apocalyptic number.

72006187 is a deficient number, since it is larger than the sum of its proper divisors (7075013).

72006187 is a wasteful number, since it uses less digits than its factorization.

72006187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44093.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 72006187 is about 8485.6459388782. The cubic root of 72006187 is about 416.0286804530.

The spelling of 72006187 in words is "seventy-two million, six thousand, one hundred eighty-seven".