78459291 has 12 divisors (see below), whose sum is σ = 113408568. Its totient is φ = 52269984.

The previous prime is 78459289. The next prime is 78459307. The reversal of 78459291 is 19295487.

It is not a de Polignac number, because 78459291 - 2¹ = 78459289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78459221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19716 + ... + 23358.

It is an arithmetic number, because the mean of its divisors is an integer number (9450714).

Almost surely, 2^78459291 is an apocalyptic number.

78459291 is a deficient number, since it is larger than the sum of its proper divisors (34949277).

78459291 is a wasteful number, since it uses less digits than its factorization.

78459291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042 (or 6039 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 78459291 is about 8857.7249336384. The cubic root of 78459291 is about 428.1028572632.

The spelling of 78459291 in words is "seventy-eight million, four hundred fifty-nine thousand, two hundred ninety-one".