72920843 has 2 divisors, whose sum is σ = 72920844. Its totient is φ = 72920842.

The previous prime is 72920831. The next prime is 72920863. The reversal of 72920843 is 34802927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72920843 - 2¹⁴ = 72904459 is a prime.

It is not a weakly prime, because it can be changed into another prime (72920863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36460421 + 36460422.

It is an arithmetic number, because the mean of its divisors is an integer number (36460422).

Almost surely, 2^72920843 is an apocalyptic number.

72920843 is a deficient number, since it is larger than the sum of its proper divisors (1).

72920843 is an equidigital number, since it uses as much as digits as its factorization.

72920843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 72920843 is about 8539.3701758385. The cubic root of 72920843 is about 417.7828038389.

The spelling of 72920843 in words is "seventy-two million, nine hundred twenty thousand, eight hundred forty-three".