78946417 has 16 divisors (see below), whose sum is σ = 88418304. Its totient is φ = 69874000.

The previous prime is 78946397. The next prime is 78946421. The reversal of 78946417 is 71464987.

It is a cyclic number.

It is not a de Polignac number, because 78946417 - 2⁷ = 78946289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78946447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160542 + ... + 161032.

It is an arithmetic number, because the mean of its divisors is an integer number (5526144).

Almost surely, 2^78946417 is an apocalyptic number.

It is an amenable number.

78946417 is a deficient number, since it is larger than the sum of its proper divisors (9471887).

78946417 is a wasteful number, since it uses less digits than its factorization.

78946417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860.

The product of its digits is 338688, while the sum is 46.

The square root of 78946417 is about 8885.1796267718. The cubic root of 78946417 is about 428.9870097475.

The spelling of 78946417 in words is "seventy-eight million, nine hundred forty-six thousand, four hundred seventeen".