78147773 has 8 divisors (see below), whose sum is σ = 85328640. Its totient is φ = 70979680.

The previous prime is 78147761. The next prime is 78147787. The reversal of 78147773 is 37774187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78147773 - 2⁴ = 78147757 is a prime.

It is a super-2 number, since 2×78147773² = 12214148849719058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78147473) 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 7 ways as a sum of consecutive naturals, for example, 13361 + ... + 18297.

It is an arithmetic number, because the mean of its divisors is an integer number (10666080).

Almost surely, 2^78147773 is an apocalyptic number.

It is an amenable number.

78147773 is a deficient number, since it is larger than the sum of its proper divisors (7180867).

78147773 is a wasteful number, since it uses less digits than its factorization.

78147773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6387.

The product of its digits is 230496, while the sum is 44.

The square root of 78147773 is about 8840.1229063854. The cubic root of 78147773 is about 427.5355200016.

The spelling of 78147773 in words is "seventy-eight million, one hundred forty-seven thousand, seven hundred seventy-three".