72137606 has 8 divisors (see below), whose sum is σ = 108870744. Its totient is φ = 35847360.

The previous prime is 72137603. The next prime is 72137669. The reversal of 72137606 is 60673127.

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

It is a super-2 number, since 2×72137606² = 10407668398822472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72137603) 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 3 ways as a sum of consecutive naturals, for example, 110315 + ... + 110966.

It is an arithmetic number, because the mean of its divisors is an integer number (13608843).

Almost surely, 2^72137606 is an apocalyptic number.

72137606 is a deficient number, since it is larger than the sum of its proper divisors (36733138).

72137606 is a wasteful number, since it uses less digits than its factorization.

72137606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221446.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 72137606 is about 8493.3860150119. The cubic root of 72137606 is about 416.2816255915.

The spelling of 72137606 in words is "seventy-two million, one hundred thirty-seven thousand, six hundred six".