72950081 has 2 divisors, whose sum is σ = 72950082. Its totient is φ = 72950080.

The previous prime is 72950071. The next prime is 72950093. The reversal of 72950081 is 18005927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46117681 + 26832400 = 6791^2 + 5180^2 .

It is an emirp because it is prime and its reverse (18005927) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72950081 is a prime.

It is a super-2 number, since 2×72950081² = 10643428635813122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72950021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36475040 + 36475041.

It is an arithmetic number, because the mean of its divisors is an integer number (36475041).

Almost surely, 2^72950081 is an apocalyptic number.

It is an amenable number.

72950081 is a deficient number, since it is larger than the sum of its proper divisors (1).

72950081 is an equidigital number, since it uses as much as digits as its factorization.

72950081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 72950081 is about 8541.0819572230. The cubic root of 72950081 is about 417.8386337905.

The spelling of 72950081 in words is "seventy-two million, nine hundred fifty thousand, eighty-one".