78979293 has 10 divisors (see below), whose sum is σ = 117981534. Its totient is φ = 52652808.

The previous prime is 78979291. The next prime is 78979301. The reversal of 78979293 is 39297987.

It can be written as a sum of positive squares in only one way, i.e., 63154809 + 15824484 = 7947^2 + 3978^2 .

It is not a de Polignac number, because 78979293 - 2¹ = 78979291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78979291) 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 9 ways as a sum of consecutive naturals, for example, 487446 + ... + 487607.

Almost surely, 2^78979293 is an apocalyptic number.

It is an amenable number.

78979293 is a deficient number, since it is larger than the sum of its proper divisors (39002241).

78979293 is an equidigital number, since it uses as much as digits as its factorization.

78979293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975065 (or 975056 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 78979293 is about 8887.0294812159. The cubic root of 78979293 is about 429.0465497926.

The spelling of 78979293 in words is "seventy-eight million, nine hundred seventy-nine thousand, two hundred ninety-three".