72137005 has 4 divisors (see below), whose sum is σ = 86564412. Its totient is φ = 57709600.

The previous prime is 72137003. The next prime is 72137027. The reversal of 72137005 is 50073127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50073127 = 13 ⋅3851779.

It can be written as a sum of positive squares in 2 ways, for example, as 21399876 + 50737129 = 4626^2 + 7123^2 .

It is not a de Polignac number, because 72137005 - 2¹ = 72137003 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 (72137003) 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, 7213696 + ... + 7213705.

It is an arithmetic number, because the mean of its divisors is an integer number (21641103).

Almost surely, 2^72137005 is an apocalyptic number.

It is an amenable number.

72137005 is a deficient number, since it is larger than the sum of its proper divisors (14427407).

72137005 is a wasteful number, since it uses less digits than its factorization.

72137005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14427406.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 72137005 is about 8493.3506344669. The cubic root of 72137005 is about 416.2804695326.

The spelling of 72137005 in words is "seventy-two million, one hundred thirty-seven thousand, five".