73105639 has 2 divisors, whose sum is σ = 73105640. Its totient is φ = 73105638.

The previous prime is 73105621. The next prime is 73105649. The reversal of 73105639 is 93650137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73105639 - 2¹³ = 73097447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73105609) 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, 36552819 + 36552820.

It is an arithmetic number, because the mean of its divisors is an integer number (36552820).

Almost surely, 2^73105639 is an apocalyptic number.

73105639 is a deficient number, since it is larger than the sum of its proper divisors (1).

73105639 is an equidigital number, since it uses as much as digits as its factorization.

73105639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 73105639 is about 8550.1835652809. The cubic root of 73105639 is about 418.1354211986.

The spelling of 73105639 in words is "seventy-three million, one hundred five thousand, six hundred thirty-nine".