72940141 has 2 divisors, whose sum is σ = 72940142. Its totient is φ = 72940140.

The previous prime is 72940139. The next prime is 72940163. The reversal of 72940141 is 14104927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62884900 + 10055241 = 7930^2 + 3171^2 .

It is a cyclic number.

It is not a de Polignac number, because 72940141 - 2¹ = 72940139 is a prime.

Together with 72940139, it forms a pair of twin primes.

It is the 8541-st Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72940121) by changing a digit.

It is a nontrivial repunit in base 8540.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36470070 + 36470071.

It is an arithmetic number, because the mean of its divisors is an integer number (36470071).

Almost surely, 2^72940141 is an apocalyptic number.

It is an amenable number.

72940141 is a deficient number, since it is larger than the sum of its proper divisors (1).

72940141 is an equidigital number, since it uses as much as digits as its factorization.

72940141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 72940141 is about 8540.5000439084. The cubic root of 72940141 is about 417.8196550376.

The spelling of 72940141 in words is "seventy-two million, nine hundred forty thousand, one hundred forty-one".