73720811 has 2 divisors, whose sum is σ = 73720812. Its totient is φ = 73720810.

The previous prime is 73720799. The next prime is 73720841. The reversal of 73720811 is 11802737.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73720811 - 2¹⁸ = 73458667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73720841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36860405 + 36860406.

It is an arithmetic number, because the mean of its divisors is an integer number (36860406).

Almost surely, 2^73720811 is an apocalyptic number.

73720811 is a deficient number, since it is larger than the sum of its proper divisors (1).

73720811 is an equidigital number, since it uses as much as digits as its factorization.

73720811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 73720811 is about 8586.0824011886. The cubic root of 73720811 is about 419.3049937894.

The spelling of 73720811 in words is "seventy-three million, seven hundred twenty thousand, eight hundred eleven".