73478039 has 4 divisors (see below), whose sum is σ = 73498824. Its totient is φ = 73457256.

The previous prime is 73478033. The next prime is 73478047. The reversal of 73478039 is 93087437.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73478039 - 2⁴ = 73478023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73477987 and 73478005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73478033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3617 + ... + 12650.

It is an arithmetic number, because the mean of its divisors is an integer number (18374706).

Almost surely, 2^73478039 is an apocalyptic number.

73478039 is a deficient number, since it is larger than the sum of its proper divisors (20785).

73478039 is a wasteful number, since it uses less digits than its factorization.

73478039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20784.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 73478039 is about 8571.9332125256. The cubic root of 73478039 is about 418.8442127367.

The spelling of 73478039 in words is "seventy-three million, four hundred seventy-eight thousand, thirty-nine".