73778073 has 4 divisors (see below), whose sum is σ = 98370768. Its totient is φ = 49185380.

The previous prime is 73778071. The next prime is 73778077. The reversal of 73778073 is 37087737.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73778073 - 2¹ = 73778071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73778071) 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 in 3 ways as a sum of consecutive naturals, for example, 12296343 + ... + 12296348.

It is an arithmetic number, because the mean of its divisors is an integer number (24592692).

Almost surely, 2^73778073 is an apocalyptic number.

It is an amenable number.

73778073 is a deficient number, since it is larger than the sum of its proper divisors (24592695).

73778073 is a wasteful number, since it uses less digits than its factorization.

73778073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24592694.

The product of its (nonzero) digits is 172872, while the sum is 42.

The square root of 73778073 is about 8589.4163363991. The cubic root of 73778073 is about 419.4135295308.

The spelling of 73778073 in words is "seventy-three million, seven hundred seventy-eight thousand, seventy-three".