72108199 has 4 divisors (see below), whose sum is σ = 73642464. Its totient is φ = 70573936.

The previous prime is 72108191. The next prime is 72108209. The reversal of 72108199 is 99180127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99180127 = 277 ⋅358051.

It is a cyclic number.

It is not a de Polignac number, because 72108199 - 2³ = 72108191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72108191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767062 + ... + 767155.

It is an arithmetic number, because the mean of its divisors is an integer number (18410616).

Almost surely, 2^72108199 is an apocalyptic number.

72108199 is a deficient number, since it is larger than the sum of its proper divisors (1534265).

72108199 is a wasteful number, since it uses less digits than its factorization.

72108199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534264.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 72108199 is about 8491.6546679667. The cubic root of 72108199 is about 416.2250519666.

The spelling of 72108199 in words is "seventy-two million, one hundred eight thousand, one hundred ninety-nine".