72187005 has 16 divisors (see below), whose sum is σ = 125999424. Its totient is φ = 34999680.

The previous prime is 72186997. The next prime is 72187013. The reversal of 72187005 is 50078127.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72186997) and next prime (72187013).

It is not a de Polignac number, because 72187005 - 2³ = 72186997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218584 + ... + 218913.

It is an arithmetic number, because the mean of its divisors is an integer number (7874964).

Almost surely, 2^72187005 is an apocalyptic number.

It is an amenable number.

72187005 is a deficient number, since it is larger than the sum of its proper divisors (53812419).

72187005 is a wasteful number, since it uses less digits than its factorization.

72187005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437516.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 72187005 is about 8496.2936036839. The cubic root of 72187005 is about 416.3766255274.

The spelling of 72187005 in words is "seventy-two million, one hundred eighty-seven thousand, five".