72280937 has 2 divisors, whose sum is σ = 72280938. Its totient is φ = 72280936.

The previous prime is 72280919. The next prime is 72280939. The reversal of 72280937 is 73908227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68376361 + 3904576 = 8269^2 + 1976^2 .

It is a cyclic number.

It is not a de Polignac number, because 72280937 - 2¹⁰ = 72279913 is a prime.

Together with 72280939, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72280937.

It is not a weakly prime, because it can be changed into another prime (72280939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36140468 + 36140469.

It is an arithmetic number, because the mean of its divisors is an integer number (36140469).

Almost surely, 2^72280937 is an apocalyptic number.

It is an amenable number.

72280937 is a deficient number, since it is larger than the sum of its proper divisors (1).

72280937 is an equidigital number, since it uses as much as digits as its factorization.

72280937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 72280937 is about 8501.8196287618. The cubic root of 72280937 is about 416.5571480339.

The spelling of 72280937 in words is "seventy-two million, two hundred eighty thousand, nine hundred thirty-seven".