73728019 has 2 divisors, whose sum is σ = 73728020. Its totient is φ = 73728018.

The previous prime is 73727981. The next prime is 73728023. The reversal of 73728019 is 91082737.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73728019 - 2²³ = 65339411 is a prime.

It is a super-2 number, since 2×73728019² = 10871641571328722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73728049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36864009 + 36864010.

It is an arithmetic number, because the mean of its divisors is an integer number (36864010).

Almost surely, 2^73728019 is an apocalyptic number.

73728019 is a deficient number, since it is larger than the sum of its proper divisors (1).

73728019 is an equidigital number, since it uses as much as digits as its factorization.

73728019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 73728019 is about 8586.5021399869. The cubic root of 73728019 is about 419.3186590934.

The spelling of 73728019 in words is "seventy-three million, seven hundred twenty-eight thousand, nineteen".