78973291 has 8 divisors (see below), whose sum is σ = 83528000. Its totient is φ = 74458440.

The previous prime is 78973277. The next prime is 78973303. The reversal of 78973291 is 19237987.

It is a happy number.

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 78973291 - 2¹³ = 78965099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78973231) 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, 5841 + ... + 13858.

It is an arithmetic number, because the mean of its divisors is an integer number (10441000).

Almost surely, 2^78973291 is an apocalyptic number.

78973291 is a deficient number, since it is larger than the sum of its proper divisors (4554709).

78973291 is a wasteful number, since it uses less digits than its factorization.

78973291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19929.

The product of its digits is 190512, while the sum is 46.

The square root of 78973291 is about 8886.6917916624. The cubic root of 78973291 is about 429.0356811099.

The spelling of 78973291 in words is "seventy-eight million, nine hundred seventy-three thousand, two hundred ninety-one".