72758849 has 2 divisors, whose sum is σ = 72758850. Its totient is φ = 72758848.

The previous prime is 72758839. The next prime is 72758911. The reversal of 72758849 is 94885727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57274624 + 15484225 = 7568^2 + 3935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72758849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72758797 and 72758806.

It is not a weakly prime, because it can be changed into another prime (72758839) 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, 36379424 + 36379425.

It is an arithmetic number, because the mean of its divisors is an integer number (36379425).

Almost surely, 2^72758849 is an apocalyptic number.

It is an amenable number.

72758849 is a deficient number, since it is larger than the sum of its proper divisors (1).

72758849 is an equidigital number, since it uses as much as digits as its factorization.

72758849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 50.

The square root of 72758849 is about 8529.8797764095. The cubic root of 72758849 is about 417.4732056382.

The spelling of 72758849 in words is "seventy-two million, seven hundred fifty-eight thousand, eight hundred forty-nine".