78003073 has 4 divisors (see below), whose sum is σ = 78407428. Its totient is φ = 77598720.

The previous prime is 78003059. The next prime is 78003077. The reversal of 78003073 is 37030087.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5531904 + 72471169 = 2352^2 + 8513^2 .

It is a cyclic number.

It is not a de Polignac number, because 78003073 - 2²⁵ = 44448641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78003077) 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, 201888 + ... + 202273.

It is an arithmetic number, because the mean of its divisors is an integer number (19601857).

Almost surely, 2^78003073 is an apocalyptic number.

It is an amenable number.

78003073 is a deficient number, since it is larger than the sum of its proper divisors (404355).

78003073 is a wasteful number, since it uses less digits than its factorization.

78003073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404354.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 78003073 is about 8831.9348389806. The cubic root of 78003073 is about 427.2714791560.

The spelling of 78003073 in words is "seventy-eight million, three thousand, seventy-three".