78964321 has 4 divisors (see below), whose sum is σ = 79153200. Its totient is φ = 78775444.

The previous prime is 78964309. The next prime is 78964331. The reversal of 78964321 is 12346987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12346987 = 607 ⋅20341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78964321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78964331) 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 3 ways as a sum of consecutive naturals, for example, 93811 + ... + 94648.

It is an arithmetic number, because the mean of its divisors is an integer number (19788300).

Almost surely, 2^78964321 is an apocalyptic number.

It is an amenable number.

78964321 is a deficient number, since it is larger than the sum of its proper divisors (188879).

78964321 is a wasteful number, since it uses less digits than its factorization.

78964321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188878.

The product of its digits is 72576, while the sum is 40.

The square root of 78964321 is about 8886.1870900854. The cubic root of 78964321 is about 429.0194368171.

The spelling of 78964321 in words is "seventy-eight million, nine hundred sixty-four thousand, three hundred twenty-one".