78454079 has 4 divisors (see below), whose sum is σ = 85586280. Its totient is φ = 71321880.

The previous prime is 78454063. The next prime is 78454091. The reversal of 78454079 is 97045487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78454079 - 2⁴ = 78454063 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78454039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3566084 + ... + 3566105.

It is an arithmetic number, because the mean of its divisors is an integer number (21396570).

Almost surely, 2^78454079 is an apocalyptic number.

78454079 is a deficient number, since it is larger than the sum of its proper divisors (7132201).

78454079 is a wasteful number, since it uses less digits than its factorization.

78454079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7132200.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 78454079 is about 8857.4307222806. The cubic root of 78454079 is about 428.0933775212.

The spelling of 78454079 in words is "seventy-eight million, four hundred fifty-four thousand, seventy-nine".