78757273 has 4 divisors (see below), whose sum is σ = 90008320. Its totient is φ = 67506228.

The previous prime is 78757253. The next prime is 78757279. The reversal of 78757273 is 37275787.

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 78757273 - 2¹⁷ = 78626201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78757279) 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, 5625513 + ... + 5625526.

It is an arithmetic number, because the mean of its divisors is an integer number (22502080).

Almost surely, 2^78757273 is an apocalyptic number.

It is an amenable number.

78757273 is a deficient number, since it is larger than the sum of its proper divisors (11251047).

78757273 is a wasteful number, since it uses less digits than its factorization.

78757273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11251046.

The product of its digits is 576240, while the sum is 46.

The square root of 78757273 is about 8874.5294523146. The cubic root of 78757273 is about 428.6441391925.

The spelling of 78757273 in words is "seventy-eight million, seven hundred fifty-seven thousand, two hundred seventy-three".