72649043 has 2 divisors, whose sum is σ = 72649044. Its totient is φ = 72649042.

The previous prime is 72649039. The next prime is 72649123. The reversal of 72649043 is 34094627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72649043 - 2² = 72649039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72648994 and 72649012.

It is not a weakly prime, because it can be changed into another prime (72649013) 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 as a sum of consecutive naturals, namely, 36324521 + 36324522.

It is an arithmetic number, because the mean of its divisors is an integer number (36324522).

Almost surely, 2^72649043 is an apocalyptic number.

72649043 is a deficient number, since it is larger than the sum of its proper divisors (1).

72649043 is an equidigital number, since it uses as much as digits as its factorization.

72649043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 72649043 is about 8523.4407958289. The cubic root of 72649043 is about 417.2630862114.

The spelling of 72649043 in words is "seventy-two million, six hundred forty-nine thousand, forty-three".