72018149 has 8 divisors (see below), whose sum is σ = 83859840. Its totient is φ = 60564816.

The previous prime is 72018119. The next prime is 72018157. The reversal of 72018149 is 94181027.

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 72018149 - 2⁸ = 72017893 is a prime.

It is a super-2 number, since 2×72018149² = 10373227570772402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72018119) 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, 96689 + ... + 97430.

It is an arithmetic number, because the mean of its divisors is an integer number (10482480).

Almost surely, 2^72018149 is an apocalyptic number.

It is an amenable number.

72018149 is a deficient number, since it is larger than the sum of its proper divisors (11841691).

72018149 is a wasteful number, since it uses less digits than its factorization.

72018149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194179.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 72018149 is about 8486.3507469348. The cubic root of 72018149 is about 416.0517167120.

The spelling of 72018149 in words is "seventy-two million, eighteen thousand, one hundred forty-nine".