78896173 has 8 divisors (see below), whose sum is σ = 81353592. Its totient is φ = 76455936.

The previous prime is 78896161. The next prime is 78896183. The reversal of 78896173 is 37169887.

It can be written as a sum of positive squares in 4 ways, for example, as 73222249 + 5673924 = 8557^2 + 2382^2 .

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 78896173 - 2²⁵ = 45341741 is a prime.

It is a super-2 number, since 2×78896173² = 12449212228091858, 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 (78896183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5361 + ... + 13657.

It is an arithmetic number, because the mean of its divisors is an integer number (10169199).

Almost surely, 2^78896173 is an apocalyptic number.

It is an amenable number.

78896173 is a deficient number, since it is larger than the sum of its proper divisors (2457419).

78896173 is a wasteful number, since it uses less digits than its factorization.

78896173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8591.

The product of its digits is 508032, while the sum is 49.

The square root of 78896173 is about 8882.3517719127. The cubic root of 78896173 is about 428.8959834611.

The spelling of 78896173 in words is "seventy-eight million, eight hundred ninety-six thousand, one hundred seventy-three".