78374773 has 4 divisors (see below), whose sum is σ = 78393708. Its totient is φ = 78355840.

The previous prime is 78374741. The next prime is 78374783. The reversal of 78374773 is 37747387.

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 20584369 + 57790404 = 4537^2 + 7602^2 .

It is a cyclic number.

It is not a de Polignac number, because 78374773 - 2⁵ = 78374741 is a prime.

It is a super-2 number, since 2×78374773² = 12285210085603058, 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 (78374783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (19598427).

Almost surely, 2^78374773 is an apocalyptic number.

It is an amenable number.

78374773 is a deficient number, since it is larger than the sum of its proper divisors (18935).

78374773 is a wasteful number, since it uses less digits than its factorization.

78374773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18934.

The product of its digits is 691488, while the sum is 46.

The square root of 78374773 is about 8852.9527842410. The cubic root of 78374773 is about 427.9490815630.

The spelling of 78374773 in words is "seventy-eight million, three hundred seventy-four thousand, seven hundred seventy-three".