73781087 has 2 divisors, whose sum is σ = 73781088. Its totient is φ = 73781086.

The previous prime is 73781069. The next prime is 73781131. The reversal of 73781087 is 78018737.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73781087 - 2¹⁸ = 73518943 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73781287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36890543 + 36890544.

It is an arithmetic number, because the mean of its divisors is an integer number (36890544).

Almost surely, 2^73781087 is an apocalyptic number.

73781087 is a deficient number, since it is larger than the sum of its proper divisors (1).

73781087 is an equidigital number, since it uses as much as digits as its factorization.

73781087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 73781087 is about 8589.5917830826. The cubic root of 73781087 is about 419.4192407813.

The spelling of 73781087 in words is "seventy-three million, seven hundred eighty-one thousand, eighty-seven".