73387865 has 4 divisors (see below), whose sum is σ = 88065444. Its totient is φ = 58710288.

The previous prime is 73387837. The next prime is 73387877. The reversal of 73387865 is 56878337.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56878337 = 5059 ⋅11243.

It can be written as a sum of positive squares in 2 ways, for example, as 20912329 + 52475536 = 4573^2 + 7244^2 .

It is a cyclic number.

It is not a de Polignac number, because 73387865 - 2¹⁶ = 73322329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 7338782 + ... + 7338791.

It is an arithmetic number, because the mean of its divisors is an integer number (22016361).

Almost surely, 2^73387865 is an apocalyptic number.

It is an amenable number.

73387865 is a deficient number, since it is larger than the sum of its proper divisors (14677579).

73387865 is a wasteful number, since it uses less digits than its factorization.

73387865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14677578.

The product of its digits is 846720, while the sum is 47.

The square root of 73387865 is about 8566.6717574563. The cubic root of 73387865 is about 418.6728040665.

The spelling of 73387865 in words is "seventy-three million, three hundred eighty-seven thousand, eight hundred sixty-five".