72880481 has 2 divisors, whose sum is σ = 72880482. Its totient is φ = 72880480.

The previous prime is 72880477. The next prime is 72880501. The reversal of 72880481 is 18408827.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40844881 + 32035600 = 6391^2 + 5660^2 .

It is a cyclic number.

It is not a de Polignac number, because 72880481 - 2² = 72880477 is a prime.

It is a super-2 number, since 2×72880481² = 10623129021582722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (72880681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36440240 + 36440241.

It is an arithmetic number, because the mean of its divisors is an integer number (36440241).

Almost surely, 2^72880481 is an apocalyptic number.

It is an amenable number.

72880481 is a deficient number, since it is larger than the sum of its proper divisors (1).

72880481 is an equidigital number, since it uses as much as digits as its factorization.

72880481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 72880481 is about 8537.0065596789. The cubic root of 72880481 is about 417.7057080870.

The spelling of 72880481 in words is "seventy-two million, eight hundred eighty thousand, four hundred eighty-one".